Gor`kiy, Aleksey Maksimovich
Foreign Languages Publishing, [date of publication not identified]
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
Pranawajati, 1990
Buku Referensi
Miller, Louise
VGM Career Horizons, 1995
Buku Teks