Orlik, Peter B.
Allyn & Bacon, 1994
Buku Teks
Anderson, Richard C.
McGraw-Hill, 1960
Buku Teks
Swallow, Lisa
Wiley Publishing, Inc., 2009
Buku Teks
edited by Roodney A. Ellis
Routledge, Taylor & Francis Group, 2009
Buku Teks
Butterworth-Heinemann, 1993
Buku Teks