Harlan, Kenneth M.
Michigan UMI Research Press, 1983
Buku Teks
McRae, T.W.
John Wiley & Sons, 1965
Buku Teks
Gelinas, Ulric J., author
PWS-KENT Publishing Company, 1990
Buku Teks
Myers, E.R., author
McGraw-Hill, 1984
Buku Teks
Esica Regita, author
Fakultas Ekonomi dan Bisnis Universitas Indonesia, 2013
UI - Skripsi (Membership)