Olesen, Virgina L.
Jossey Press, 1968
Buku Teks
Ashar Sunyoto Munandar, author
UI-Press, 2006
Buku Teks
Nicolson, Paula, author
MacMillan Education, 1986
Buku Teks
Adams, Linda
Gramedia Pustaka Utama, 1995
Buku Teks
Bass, Bernard M., author
Allyn and Bacon, 1979
Buku Teks