Thorelli, H.B., author
Penguin Books, 1973
Buku Teks
edited by H.B. Thorelli
Penguin Books, 1973
Buku Teks
Bradly, Frank
Prentice-Hall, 1995
Buku Teks
Cateora, Philip R., author
McGraw-Hill, 2008
Buku Teks
Kelley, Eugene J.
Prentice-Hall, 1965
Buku Teks