Calhuon, James F., author
IKIP Semarang Press, 1990
Buku Teks
Montgomery, Robert L., author
Pustaka Binaman Pressindo, 1983
Buku Teks
Mar`at, author
Ghalia Indonesia, 1981
Buku Teks
edited by Anne Roe and George Gaylord Simpson
Yale University Press, 1961
Buku Teks
Knutson, Andie L., author
Russell Sage Foundation, 1971
Buku Teks