Fortes, Meyer, author
The Athlone Press, 1970
Buku Teks
Zastrow, Charles, author
Buku Teks
Zastrow, Charles, author
Brooks/Cole, 1996
Buku Teks
Davis, Keith, 1918-, author
McGraw-Hill, 1972
Buku Teks
Davis, Keith, 1918-, author
McGraw-Hill, 1984, c1972
Buku Teks