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
Lovejoy, Laurence C., author
Aleander Hamilton Institute, 1962
Buku Teks
Yoder, Dale, author
Prentice-Hall, 1984
Buku Teks