Scharton, Maurice
Allyn and Bacon, 1993
Buku Teks
Ruggiero, Vincent Ryan
Alfred Publishing Co., Inc., 1981
Buku Teks
Mundhenk, Robert T.
Houghton Mifflin, 1978
Buku Teks
Flower, Linda
Hancourt Brace Jovanovich, 1981
Buku Teks
Arapoff, Nancy
Holt, Rinehart and Winston, 1970
Buku Teks