Safir, Kenneth J., author
Oxford University Press , 2004
Buku Teks
Follet, Ken
Morrow, 1977
Buku Teks
Macrorie, Ken
Hayden Book Co., 1980
Buku Teks
Zhaenal Fanani, author
Tiga serangkai, 2014
Buku Teks
Manktelow, Ken
East Sussex Psychology Press , 1999
Buku Teks