Poe, Richard
Prima, 1999
Buku Teks
Mackenzie, Donald A., author
Gramercy Books, 1994
Buku Referensi
Byon, Andrew Sangpil, author
Routledge, Taylor & Francis Group, 2009
Buku Teks
Azar, Betty Schrampfer, 1941-, author
Prentice-Hall, 1985
Buku Teks
Tyner, Thomas E.
Buku Teks