Konopka, Gisela, author
Prentice-Hall, 1963
Buku Teks
Trecker, Harleigh B., author
Association Press, 1967
Buku Teks
Thibaut, John W., author
John Wiley and Sons, 1967
Buku Teks
Batten,T.R., author
Oxford University Press, 1978
Buku Teks
edited by Walter A. Friedlander
Prentice-Hall of India, 1977
Buku Teks