Phaidon Press, 1945
Buku Referensi
Palmer, Vance, author
Melbourne University Press, 1940
Buku Teks
Gor`kiy, Aleksey Maksimovich, author
Foreign Languages Publishing, [date of publication not identified]
Buku Teks
edited by Gregory A. Kimble, Michael Wertheimer, Charlotte White
American Psychological Association, 1991
Buku Teks
Stewart, Ian Charles, author
Pranawajati, 1990
Buku Referensi