by G.D. Eppen ... [et.al.]
Prentice Hall International, 1998
Buku Teks
Marris, Robin
Free Press of Glencoe, 1964
Buku Teks
Bell, Colin E.
Richard D. Irwin, 1977
Buku Teks
edited by Kristian S. Palda
Prentice-Hall, 1973
Buku Teks
Kim, Chaiho, author
Addison-Wesley, 1976
Buku Teks