Kidd, Sue Monk, author
Tinder Press, 2015
Buku Teks
Jarvis, Helen, author
Prentice-Hall, 2001
Buku Teks
Taraborrelli, J. Randy, author
Sidgwick & Jackson, 2009
Buku Teks
Emoto, Masaru, author
Beyond words publishing, inc., 2005
Buku Teks
Garcia, Hector, author
Penguin Books, 2017
Buku Teks