Pattillo, James W., author
Lousiana State University Press , 1965
Buku Teks
Pyle, William W., author
Richard D. Irwin, 1980
Buku Teks
Robert F. Meigs ... [et al.]
Prentice Hall International, 2001
Buku Teks
Warren, Carl S., author
Cengage Learning, 2014
Buku Teks
South-Western , 2005
Buku Teks