Whitney, Ellie, author
Wadsworth and Cengage Learning, 2013
Buku Teks
Meyerson, Denise, author
Routledge; Cavendish, 2007
Buku Teks
Nickels, William G.,
McGraw Hil , 2016
Buku Teks
Kampourakis, Kostas, author
Cambridge University Press, 2014
Buku Teks
Neuman, William Lawrence, 1950-, author
Pearson, 2014
Buku Teks