Aby, Stephen H., 1949-, author
Greenwood Press, 1990
Buku Teks
Miller, Jordan Y.
McGraw-Hill Book Company, Inc., 1961
Buku Teks
Eaglestone, Robert, author
Routledge , 2005
Buku Teks
Headrick, Paul, 1957-, author
Wiley-Blackwell, 2014
Buku Teks
Bynagle, Hans E.
Libraries Unlimited, 1986
Buku Referensi