Bhuana Ilmu Popule, 2007
Buku Referensi
Patterson, Jerry E., author
Crown Publishers, 1974
Buku Teks
Paul C. Adams, Julie Cupples, Kevin Glynn, André Jansson and Shaun Moores, authors
Routledge, 2017
Buku Teks
editorial coordinator, Simone K. Schleifer
FKG, 2010
Buku Referensi
Andrew R. Williams, author
Taylor & Francis, 2008
Buku Teks