Segal, Elizabeth A., author
F.E. Peacock Publishers, Inc., 1998
Buku Teks
Segal, Elizabeth A.
Buku Teks
Gilbert, Neil, author
Prentice-Hall, 1986
Buku Teks
Gilbert, Neil, author
Allyn and Bacon, 1998
Buku Teks
Gilbert, Neil, author
Prentice-Hall, 1974
Buku Teks