Levine, Peter A., author
North Atlantic Book, 2006
Buku Teks
Farrell, Edmund James ... [et al.]
Scott, Foresman, 1976
Buku Teks
Tomlinson, Carl M., author
Allyn and Bacon, 2002
Buku Referensi
Knowles, Murray, author
Routledge, 1996
Buku Teks
Haviland, Virginia, author
Scott, Foresman, 1973
Buku Teks