Macfadyen, A.
Pitman, 1963
Buku Teks
Linden, Eugene
A Dutton Book, 1999
Buku Teks
Scott, John Paul
University of Chicago Press, 1958
Buku Teks
Louw, Gideon N.
Longman Scientific and Technical, 1993
Buku Teks
Flanders, Frank B.
Delmar Cengage Learning, 2012
Buku Teks