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