Highsmith, Richard M., Jr.
J.B.Lippincott Co., 1963
Buku Teks
Israel, Saul, author
Holt, Rinehart and Winston, 1976
Buku Teks
James, Preston E., author
Macmillan, 1972
Buku Teks
Fuson, Robert H.
Kendall/Hunt Publishing Co., 1977
Buku Teks
Baransky, N. N., author
Foreign Languages Publishing House, 1956
Buku Teks