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