Hacker, Andrew
St. Martin's Griffin, 2011
Buku Teks
Severinghaus, Aura E.
McGraw-Hill , 1953
Buku Teks
Cottle, Thomas J.
The University of Chicago Press, 1977
Buku Teks
editor by Charles S. Lenth
Joses-Bases , 1991
Buku Teks
Bender, David R.
Library Professional Publications , 1980
Buku Teks