edited by Elena Andresen, Erin DeFries Bouldin
Jossey- Bass, 2010
Buku Teks
Egger, Garry, author
McGraw-Hill, 1993
Buku Teks
Daly, John L., 1952-, author
M.E. Sharpe, 2012
Buku Teks
Fischer, Frank, author
Oxford University Press, 2012
Buku Teks
Green, Michelle A., author
Delmar Cengage Learning, 2011
Buku Teks