McKay, Sandra Lee, author
Mahwah, New Jersey, 2006
Buku Teks SO
Harris, David P., author
McGraw-Hill, 1969
Buku Teks
by John M. Norris ... [et. al.]
University of Hawaii Press, 1998
Buku Teks
Cambridge University Press, 1990
Buku Teks
editor, Ronald Mackay, Bruce Barkman, R.R. Jordan
Newbury House Publishers, Inc., 1979
Buku Teks