Arens, Alvin A., author
Prentice Hall International, Inc., 2000
Buku Teks
Pound, Greg, author
McGraw-Hill, 1988
Buku Teks
Scott, Richard A., 1935-, author
Reston Publishing, 1982
Buku Teks
Wallace, Wanda A., author
South-Western , 1995
Buku Teks
Willingham, John J., author
McGraw-Hill, 1979
Buku Teks