Haire, Mason, author
McGraw-Hill, 1956
Buku Teks
Ghiselli, Edwin E., author
McGraw-Hill, 1955
Buku Teks
DuBrin, Andrew J., author
Prentice-Hall, 2000
Buku Teks
Dipboye, Robert L., author
Harcourt Brace College, 1994
Buku Teks
Blum, Milton L., author
Harper & Brothers , 1956
Buku Teks