Johnson, Richard E., author
Houghton Mifflin , 1972
Buku Teks
Shuchman, Abe
Holt, Rinehart and Winston, Inc., 1963
Buku Teks
Prentice-Hall, 1991
Buku Teks
Levin, Richard I., author
McGraw-Hill International, c1982
Buku Teks
Stainton, R.S.
Jakarta: Bina Aksara, 1983
Buku Teks