Mayeroff, Milton
Gramedia Pustaka Utama, 1993
Buku Teks
Hutabarat, Hermin
Gunung Mulia, 1989
Buku Teks
Post, Peggy, author
HarperCollins Publishers, 2004
Buku Teks
Hoedojo Hoed
Balai Pustaka, 1994
Buku Teks
Beyfus, Drusilla
Reed International Books, [date of publication not identified]
Buku Teks