Ford, Marjorie, author
Longman, 2001
Buku Teks
Buscemi, Santi V., author
McGraw-Hill , 2002
Buku Teks
Connelly, Mark, author
Wadsworth and Cengage Learning, 2013
Buku Teks
Gillespie, Sheena, author
Scott, Foresman and Company, 1986
Buku Teks
Trimmer, Joseph F., author
Houghton Miffiln, 1981
Buku Teks