Bowman, J.H., author
Facet Publishing, 2003
Buku Referensi
Van Ghent, Dorothy, author
Bobbs-Merrill Co., 1965
Buku Teks
Chang, Raymond, author
McGraw-Hill, 1996
Buku Teks
Bowman, J.H., author
Facet, 2004
Buku Teks
Bowman, J.H., author
Facet, 2003
Buku Teks