Kaufmann, Walter, editor
Reader's Digest Press, 1977
Buku Teks
Cambridge University Press, 2009
eBooks
Michael Nelson, Martha Craven Nussbaum, James V. Mirollo, Mera J. Flaumenhaft
Jossey-Bass, 2000
Buku Teks
Gardiner, Eileen, author
Cambridge University Press, 2015
Buku Teks
Gardiner, Eileen, author
Cambridge University Press, 2015
Buku Teks