Baum, Stuart J., author
Macmillan, 1993
Buku Teks
Neal, A. Leslie
McGraw-Hill, 1971
Buku Teks
Holum, John R., author
John Wiley & Sons, 1975
Buku Teks
Anderson, Arthur K., author
John Wiley & Sons, 1953
Buku Teks
Holum, John R., author
John Wiley & Sons, 1983
Buku Teks