Rossiter, John R., author
Irwin/McGraw-Hiil, 1996
Buku Teks
Barban, Arnold M., author
Richard D. Irwin, 1968
Buku Teks
Bovee, Courtland L., author
Richard D. Irwin, 1989
Buku Teks
Dyer, Gillian
Routledge, 1996
Buku Teks
Lwin, May, author
Bhuana Ilmu Populer, 2005
Buku Teks