edited by Anne Roe and George Gaylord Simpson
Yale University Press, 1961
Buku Teks
Combs, Arthur W., author
Harper & Row, Publishers., 1959
Buku Teks
Knutson, Andie L., author
Russell Sage Foundation, 1971
Buku Teks
Powell, Russell A., 1950-, author
Wadsworth and Cengage Learning, 2013
Buku Teks
Powell, Russell A., 1950-, author
Cengage Learning, 2017
Buku Teks