Munro, William Bennett
Macmillan, 1952
Buku Teks
Nowak, John E.
Thomson/West, 2010
Buku Teks
introduction by Edward G. Smith
Barnes & Noble, 1966
Buku Teks
Dumbauld, Edward
University of Oklahoma Press, 1946
Buku Teks
Antieau, Chester James
Dennis & Co., 1960
Buku Teks