University of Wisconsin-Madison, 1966
University of Wisconsin-Milwaukee, 1968
University of North Carolina, 1969
Drake University, 1969
Shippensburg State College, 1969 (tele-lecture)
Indiana University, 1970
University of Illinois, 1971
Indiana State University, 1971
Eisenhower College, 1971
University of Delaware, 1971
San Fernando Valley State College, 1972
Florida State University, 1972
University of South Florida, 1972
University of Hawaii, 1972
University of Missouri, 1977
Ohio University, 1977
University of Southern California, 1977
Mississippi State University, 1978
Pennsylvania State University, 1978
Western Michigan University, 1979
California State University-Sacramento, 1979
University of Texas, 1979
University of Massachusetts, 1980
University of Texas, 1980
Oberlin College, 1980
Texas Christian University, 1981
California State University-Fresno, 1981
Montana State University, 1981
University of Texas, 1981
Ohio University, 1981
Auburn University, 1982
Mississippi State University, 1983
University of Maine, 1983
University of Puerto Rico, 1983
University of Oklahoma, 1984
Pennsylvania State University, 1985
Defense Information School, 1985
California State University-Fresno, 1985
Barry University, 1986
Golden West College, 1986
Ferris State College, 1986
University of Hawaii, 1986
Fairfield University, 1987
St. Norbert College, 1988
California State University-Sacramento, 1988
Indiana State University, 1989
University of Wisconsin-River Falls, 1989
Auburn University, 1990
University of Alabama-Birmingham, 1990
California State University-Long Beach, 1990
University of Jyvaskyla (Finland), 1991
Washington State University, 1991
Old Dominion University, 1993
Potchefstroom University (South Africa), 1993
Waikato University (New Zealand), 1994
Auckland Institute of Technology (New Zealand), 1994
Texas Tech University, 1995
California State University, Long Beach, 1996
University of Oklahoma, 1996
Old Dominion University, 1996 (telelecture)
Ohio University, 1996 (telelecture)
Louisiana State University, 1997
Eastern Tennessee State University, 1997
Pennsylvania State University, 1998
University of New Haven, 1998
New York University, 1998
Ohio University, 1999
Syracuse University, 1999
New York University, 2000
California State University, Long Beach, 2000
Southwest Texas State University, 2001
Baldwin-Wallace College, 2001
California State University, 2001
New York University, 2002
University of Alabama, Birmingham, 2002
California State University, Long Beach, 2003
Michigan State University, 2005 
California State University, Long Beach, 2007

Mississippi State University, 2007

California State University, Fullerton, 2007

California State University, Long Beach, 2007