Saint-Laurent, George E., author
Mayfield, 2000
Buku Teks
Cammack, Paul Anthony, author
Macmillan, 1993
Buku Teks
Ethridge, Marcus E., author
Wadsworth, 2010
Buku Teks
Ethridge, Marcus E., author
Wadsworth and Cengage Learning, 2013
Buku Teks
David, Rene, 1906-, author
Stevens & sons, 1985
Buku Teks