Pickle, Hal. B.
John Wiley & Sons, 1984
Buku Teks
Sondeno, Stanley R., author
Business Publications, 1985
Buku Teks
Steinhoff, Dan
McGraw-Hill, 1978
Buku Teks
Hodgetts, Richard M., author
Harcourt College Publishers, 2001
Buku Teks
Hatten, Timothy S., author
South Western Cengage Learning, 2012
Buku Teks