Davis, Keith, 1918-, author
McGraw-Hill, 1989
Buku Teks
Miles, Robert H.
Goodyear Publishing Company, 1980
Buku Teks
Gibson, James L., author
McGraw-Hill, 2000
Buku Teks
Kolb, David A., author
Prentice-Hall, 1991
Buku Teks
Downey, H. Kirk
West Publishing, 1977
Buku Teks