Anderson, Chris, author
Headline Publishing Group, 2016
Buku Teks
Schwarz, Ted
Ohio Writer's Digest Books, 1990
Buku Teks
by Cal M. Lague [and others]
Allyn and Bacon, 1982
Buku Teks
Manneke Budiman, author
Fakultas Ilmu Pengetahuan dan Budaya Universitas Indonesia, 1989
UI - Skripsi Membership
Chih, Ted Yang
McGraw-Hill, 1996
Buku Teks