Engler, Richard E.
Harper & Row, 1964
Buku Teks
Engler, Richard E., author
Harper & Row, 1964
Buku Teks
Janda, Kenneth, author
Houghton Mifflin, 2000
Buku Teks
Myrdal, Gunnar, 1898-, author
Pantheon Books, 1963
Buku Teks
Einstein, Mara, author
Lawrence Erlbaum, 2004
Buku Teks