Belch, George E., author
McGraw-Hill, 2009
Buku Teks
Belch, George E., author
McGraw-Hill, 2015
Buku Teks
Aljerow Putra, author
2016
UI - Skripsi (Membership)
Boyd, Harper W., Jr., author
Prentice-Hall, 1967
Buku Teks
Ahuja, B. N., author
Surjeet Publications, 1990
Buku Teks