edited by William Line and Margery R. King
University of Toronto Press, 1956
Buku Teks
Lemkau, Paul V.
McGraw-Hill Book Company, INC, 1955
Buku Teks
Barry, Patricia D.
Lippincott , 1998
Buku Teks
Worley, Nancy K., author
Mosby , 1997
Buku Teks
Reynolds, Amanda, author
Open universtity press , 2000
Buku Teks