Nababan, Gistang Richard, author
Fakultas Ekonomi dan Bisnis Universitas Indonesia, 2006
UI - Tesis (Membership)
Stanton, William J., author
McGraw-Hill, 1984
Buku Teks
Boyd, Harper W., Jr., author
Richard D. Irwin, 1958
Buku Teks
Lovelock, Christopher H., author
McGraw-Hill, 1985
Buku Teks
Cravens, David W., author
McGraw-Hill Irwin, 2002
Buku Teks