Kline, John M., author
Quorum Books, 1985
Buku Teks
Eiteman, David K., author
Pearson, 2019
Buku Teks
[edited by] S. Prakash Sethi, Jagdish N. Sheth
Goodyear, 1973
Buku Teks
Sethi, S. Prakash, author
Goodyear, 1973
Buku Teks
Levi, Maurice D., 1945-, author
McGraw-Hill, 1990
Buku Teks