edited by Bernard M. Bass and Samuel D. Deep
Prentice-Hall, 1970
Buku Teks
edited by W. Lloyd Warner and Norman H. Martin
Harper & Brothers, 1959
Buku Teks
Ewing, David W., author
Free Press of Glencoe, 1964
Buku Teks
Harrell, Thomas W., author
South-Western Publishing, 1961
Buku Teks
Bellows, Roger, author
Prentice-Hall, 1962
Buku Teks