Malchow, Howard L., author
Bloomsbury Academic, an imprint of Bloomsbury Pub, 2016
Buku Teks
Shimko, Keith L., 1962-, author
Cengage Learning, 2016
Buku Teks
Shimko, Keith L., 1962-, author
Wadsworth and Cengage Learning, 2013
Buku Teks
John Baylis, Steve Smith, Patricia Owens.
Oxford University Press, 2014
Buku Teks
Smith, Roy H., author
Routledge, 2017
Buku Teks