edited by Richard P. Halgin
Duskhin , 2000
Buku Teks
Bennett, Paul, author
Open University Press, 2003
Buku Teks
Carson, Robert C., author
Longman, 1997
Buku Teks
edited by Henry Wechsler, Leonard Solomon, Bernard M. Kramer
Holt, Rinehart and Winston, 1970
Buku Teks
Edited Kurt Finsterbusch and George Mckenna
Dushkin Publishing Group, 1986
Buku Teks