Darby, Michael R., author
McGraw-Hill, 1976
Buku Teks
Wachtel, Paul, author
McGraw-Hill , 1989
Buku Teks
Hall, Robert Ernest, author
W.W. Norton, 1986
Buku Teks
Ackley, Gardner, author
Macmillan, 1978
Buku Teks
Boyes, William J., author
South Western Publishing, 1984
Buku Teks