Merchant, Michael J., author
Wadsworth, 1977
Buku Teks
Chivers,Ian D. (Ian David), 1952- author
Ellis Horwood, 1990
Buku Teks
Stern, Nancy B., author
Wiley, 1994
Buku Teks
Graver, Robert T., author
Prentice-Hall, 1983
Buku Teks
Higgins, David, author
Prentice-Hall, 1983
Buku Teks