Konopka, Gisela, author
Prentice-Hall, 1963
Buku Teks
Trecker, Harleigh B., author
Association Press, 1967
Buku Teks
Thibaut, John W.
John Wiley & Sons, 1967
Buku Teks
Blumenthal, Louis H., author
Buku Teks
Batten,T. R., author
Oxford University Press, 1978
Buku Teks