Norwood, Susan L., author
Prentice-Hall, 2003
Buku Teks
Kemp, Brenda B., author
Little, Brown & Co., 1984
Buku Teks
Goodman, Benny, author
Learning matters Ltd., 2008
Buku Teks
Dewi Kusuma Mayasari, author
Fakultas Ilmu Sosial dan Ilmu Politik Universitas Indonesia, 1986
UI - Skripsi Membership
Levoy, Robert P., author
Rajawali , 1986
Buku Teks