Armstrong, James W., author
Macmillan, 1976
Buku Teks
Campbell, Hugh G., author
Macmillan, 1974
Buku Teks
Rothenberg, Ronald I., author
John Wiley and Sons, 1980
Buku Teks
Drooyan, Irving, author
Wadsworth, 1971
Buku Teks
Maki, Daniel P., author
McGraw-Hill, 1983
Buku Teks