Holland, Norman Norwood, author
Oxford Universiy Press, 1990
Buku Referensi
Lawrence, Karen, author
McGraw-Hill Publishing, 1992
Buku Referensi
Pirie, David B., author
Roetledge, 1985
Buku Referensi
Baker, Nancy L., author
The Modern Language Association of america, 1985
Buku Referensi
Carl M. White and associates: William W. Brickman ... [and others]
American Library Assoiation, 1973
Buku Referensi