Blake, Robert R.
Texas Gulf, 1961
Buku Teks
Radford, K.J.
Phoenix Press, 1981
Buku Teks
Melman, Seymour
Oxford, Basil Blacwell & Mott
Buku Teks
Thomas N. Ingram...[et al.]
Harcourt College Publishers, 2001
Buku Teks
Schroeder, Roger G.
McGraw-Hill, 1993
Buku Teks