James, James, author
Van Nostrand Reinhold, 1976
Buku Referensi
edited by David Nelson
Penguin Books, 2003
Buku Referensi
editor in chief, Sybil P. Parker
McGraw-Hill, 1997
Buku Referensi
editor, Daniel N. Lapedes
McGraw-Hill, 1978
Buku Referensi
Hollands, Roy, author
Erlangga, 1991
Buku Referensi