Ahuja, Hira N., author
John Wiley & Sons, 1980
Buku Teks
Matz, Adolph, author
Ohio South-Western Publishing , 1967/1991
Buku Teks
Hansen, Don R., author
South-Western College, 2000
Buku Teks
Hansen, Don R., author
South-Western College Publishing, 1997
Buku Teks
Usry, Milton F., author
South Western, 1988
Buku Teks