Sampson, Robert C., author
Harper & Row, 1955
Buku Teks
edited by Max S. Wortman
Allyn and Bacon , 1970
Buku Teks
Hunter, Guy, author
University of London Press, 1961
Buku Teks
Yoder, Dale, author
Prentice-Hall, 1962
Buku Teks
Nankervis, Alan R., author
Thomas Nelson Australia, 1996
Buku Teks