Marquis, Bessie L.
J.B. Lippincott, 1987
Buku Teks
Veatch, Robert M.
Oxford University Press, 2015
Buku Teks SO
Springer Science+Business Media, 2015
eBooks
Ingram, Robert W.
Thomson/South-Western, 2004
Multimedia
Knapp, Michael C.
Ohio South-Western, 1998
Buku Teks