Mar`at, author
Ghalia Indonesia, 1981
Buku Teks
M. Himawan T. Arifianto, author
Fakultas Psikologi Universitas Indonesia dan Ikatan Psikologi Sosial-HIMPSI, 2017
Artikel Jurnal
edited by Anne Roe and George Gaylord Simpson
Yale University Press, 1961
Buku Teks
Lindgran, Henry Clay
John Wiley & Sons, 1966
Buku Teks
Munn, Norman L., author
Houghton-Mifflin, 1955
Buku Teks