Hurn, Christopher J.
Allyn and Bacon, 1993
Buku Teks
Seth, Michael, author
University of Hawaii Press, 2002
Buku Teks
Allyn and Bacon, Inc., 1975
Buku Teks
Maideus, Melinda
Facts on File, 1981
Buku Teks
Sett, Michael J.
University of Hawai'i Press, 2002
Buku Teks