McClelland, David C. (David Clarence), author
The Free Press, 1967
Buku Teks
McClelland, David Clarence, author
Vakils, Feffer and Simon Private, 1961
Buku Teks
McClelland, David C. (David Clarence), author
Feffer and Simons Private , 1961
Buku Teks
Leaver, Betty Lou, author
Cambridge Press , 2005
Buku Teks
Shapiro, Sidney A., 1947-, author
Oxford University Press, 2014
Buku Teks