Hanke, Jonh E., author
Pearson Prentice Hall, 2005
Buku Teks
Bratt, Elmer C., author
McGraw-Hill, 1958
Buku Teks
edited by William F. Butler, Robert A. Kavesh
Prentice-Hall, 1966
Buku Teks
Bassie, V. Lewis
McGraw-Hill Book Company, Inc , 1958
Buku Teks
Abramson, Adolph G., author
John Wiley & Sons, 1956
Buku Teks