Maynard, Lee
New York Washington Square Press 1988
Buku Teks
Collin, Jackie
Simon and Schuster , 1983
Buku Teks
Hardy, Ronald
New York Doubleday & Company Inc 1958
Buku Teks
Scott, E Evelyn
New York T Seltzer 1923
Buku Teks
Stamper, J.B.
New York Scholastic 1991
Buku Teks