Angelakos, Diogenes J.,
McGraw-Hill, 1968
Buku Teks
Emerald, 2017
eBooks
Andrews, jean, author
Course Technology, 2013
Buku Teks
Evans, Christina
Butterworth, [date of publication not identified]
Buku Teks
Raed, Jane M., author
Chandos Publishing, 2003
Buku Teks