Cochron, Bert, author
Funk & Wagnalls, 1969
Buku Teks
Ross, Lillian, author
J.B. Lippincott, 1966
Buku Teks
Muller, Herbert J., author
Harper & Row, 1967
Buku Teks
Hoppen, K. Theodore, author
Oxford University Press, 2016
eBooks
Liswood, Laura A., author
Pandora, 1995
Buku Referensi