Pickle, Hal B.
John Wiley & Sons, 1984
Buku Teks
Steinhoff, Dan
McGraw-Hill, 1978
Buku Teks
Hodgetts, Richard M.
Harcourt College Publishers, 2001
Buku Teks
Hatten, Timothy S.
South Western Cengage Learning, 2012
Buku Teks
Hodgetts, Richard M.
John Wiley & Sons, 2002
Buku Teks