Countryman, Vern, author
Little, Brown, 1971
Buku Teks
Gunther, Gerald, author
Foundation Press, 1970
Buku Teks
Braucher, Robert, author
Foundation Press, 1953
Buku Teks
Mashaw, Jerry L, author
Thomson/West, 2009
Buku Teks
by Paul A. Freund [and others]
Little, Brown, 1966
Buku Teks