compiled by David R. Hampton
Prentince-Hall of India, 1979
Buku Teks
Stephen A.Ross
Mc Graw Hill, 2009
Buku Teks
Gross, Irma H., author
Appleton-Countury Crofts, 1954
Buku Teks
Murdick, Robert G., author
Prentice-Hall, 1984
Buku Teks
Buffa, Elwood S. (Elwood Spencer), author
John Wiley & Sons, 1973
Buku Teks