Wingate, John W., author
South-Western Publishing, 1959
Buku Teks
Futrell, Charles M., author
McGraw-Hill/Irwin, 2002
Buku Teks
Futrell, Charles M., author
McGraw-Hill, 2014
Buku Teks
Allen, Peter, author
Pitman, 1998
Buku Teks
Allen, Robert Y., author
McGraw-Hill, 1984
Buku Teks