Foster, Dennis L., author
RajaGrafindo Persada, 2000
Buku Teks
Mancini, Marc, author
Thomson/Delmar Learning, 2005
Buku Teks
Metelka, Charles J., author
Delmar, 1990
Buku Referensi
Middleton, Victor T.C., author
Butterworth-Heinemann, 2000
Buku Teks
Boniface, Brian G, author
Routledge, 2016
Buku Teks