Marilyn Hryciuk, editor
Bob Douglas, 1986
Buku Referensi
Moss, John, 1940-, editor
NC Press, 1983
Buku Teks SO
edited by Donald Baker ... [and others]
Columbia University Press , 1993
Buku Teks SO
Dunne, Lavon J.
McGraw-Hill, 2001
Buku Teks SO
ed. by Howard S. Rowland
An Aspen publication , 1984
Buku Referensi