Gillespie, Sheena, author
Scott, Foresman and Company, 1986
Buku Teks
Day, Susan
McGraw-Hill, 1988
Buku Teks
Connelly, Mark, author
Wadsworth and Cengage Learning, 2013
Buku Teks
Trimmer, Joseph F., author
Houghton Miffiln, 1981
Buku Teks
Buscemi, Santi V., author
McGraw-Hill , 2002
Buku Teks