Spencer, Donald D.
Prentice-Hall, 1977
Buku Teks
Mochel, Myron G., author
McGraw-Hill, 1971
Buku Teks
Kreitzberg, Charles B., author
Harcourt Brace Jovanovich, 1972
Buku Teks
Etter, Delores M. (Delores Maria), 1947-, author
Bina Aksara, 1989
Buku Teks
Khailany, Asad
Prentice-Hall, 1981
Buku Teks