Ginzberg, Eli
Simon and Schuster, 1958
Buku Teks
Lauffer, Armand
sage Publications, 1985
Buku Teks
selected, edited, and with introductions by David M. Hall
McGraw-Hill, 2013
Buku Teks
Shilling, Dana, author
Prentice-Hall, 1998
Buku Referensi
Baird, Lloyd S., author
Business One Irwin, 1992
Buku Referensi