Kagan, Shelly, author
Yale University Press, 2012
Buku Teks
Kagan, Shelly, author
Yale University Press, 2012
Buku Teks
Oxford Blackwell Publishers 1997,
Buku Teks
Fisher, Robert C.
Dickenson Publishing Company, Inc., 1970
Buku Teks
Juvinall, Robert C.
John Wiley & Sons, c1991
Buku Teks