Metelka, Charles J.
Delmar, 1990
Buku Referensi
Mancini, Marc
Thomson/Delmar Learning, 2005
Buku Teks
editor, Francois Vellas, Lionel Becherel; penerjemah, Indriati
Yayasan Obor Indonesia, 2008
Buku Teks
Foster, Dennis L.
RajaGrafindo Persada, 2000
Buku Teks
Foster, Douglas
Macmillan, 1985
Buku Teks