Hill, Charles W. L., author
Houghton Mifflin , 1989
Buku Teks
Petersen, Dan
Aloray, 1988
Buku Teks
Cullen, John B. (John Brooks), 1948-, author
Thomson, 2005
Buku Teks
Berman, Barry, author
Prentice Hall International, 1998
Buku Teks
Berman, Barry, author
Prentice-Hall, 2010
Buku Teks