Taylor, Shelley E., author
Prentice-Hall, 1997
Buku Teks
Callaghan, Jane, author
Learning Matters, 2011
Buku Teks
Lindesmith, Alfred R., author
Holt, Rinehart and Winston, 1956
Buku Teks
Newcomb, Theodore M., author
Holt, Rinehart and Winston, 1961
Buku Teks
Aronson, Elliot, author
Prentice-Hall, 2007
Buku Teks