Biagi, Shirley
Wadsworth and Cengage Learning, 2012
Buku Teks
Biagi, Shirley
Cengage Learning, 2015
Buku Teks
Vivian, John
Pearson and AB, 2007
Buku Teks
editor, Joseph F. Littell
McDougal, Littel and Company, 1976
Buku Teks
Turow, Joseph
Routledge, 2009
Buku Teks