Hilgard, Ernest R. (Ernest Ropiequet), 1904-2001, author
Prentice-Hall, 1975
Buku Teks
Burke, Kay, author
Hawker Brownlow Education, 1999
Buku Teks
edited by Michael Shayer
Open University Press, 2002
Buku Teks
Hergenhahn, B.R., 1934-, author
[publisher not identified], 1976
Buku Teks
Hergenhahn, B.R., 1934-, author
Prentice Hall International, 1988
Buku Teks