Van Duyn, Julia, author
Reston Publishing Company, Inc ., 1975
Buku Teks
Van Duyn, Julia, author
Reston Publishing Company, Inc ., 1975
Buku Teks
George, Joey F., author
Pearson, 2004
Buku Teks
Bennett, Simon, author
McGraw-Hill, 2010
Buku Teks
Embley, David W., author
Yourdan Press, 1992
Buku Teks