Campbell, Hugh G., author
Macmillan, 1974
Buku Teks
Rothenberg, Ronald I., author
John Wiley & Sons, 1980
Buku Teks
Drooyan, Irving, author
Wadsworth, 1971
Buku Teks
Maki, Daniel P., author
McGraw-Hill, 1983
Buku Teks
Meserve, Bruce B., author
Prentice-Hall, 1972
Buku Teks