Olson, Reuben M., author
International Textbook, 1961
Buku Teks
Mironer, Alan, author
McGraw-Hill, 1979
Buku Teks
Crowe, Clayton T., author
John Wiley and Sons, 2001
Buku Teks
Daugherty, Robert L. (Robert Long), 1885-, author
McGraw-Hill, 1985
Buku Teks
Roberson, John A., author
Houghton Miffiln, 1990
Buku Teks