edited by Arlene J. Lowenstein, Lynn Foord-May, Jane C. Romano
Jones and Bartlett, 2009
Buku Teks
Welton, David A.
Mifflin Company, 1987
Buku Teks
edited by Richard Parncutt and Gary E. McPherson
Oxford University Press, 2002
Buku Teks
Redman, Barbara Klug, author
Mosby Comp., 1980
Buku Teks
Delphin, Patricia
Virgnia Reston publishing 1983 , 1983
Buku Teks