McClelland, David C. (David Clarence), author
The Free Press, 1967
Buku Teks
McClelland, David Clarence, author
Vakils, Feffer and Simon Private, 1961
Buku Teks
Russel, Elizabeth
Family Service Association of America, 1947
Buku Teks
Debo, Harvey V.
Wiley, 1980
Buku Teks
Whincup, Michael H., 1929-
Butterworth-Heinemann, 1995
Buku Teks