Taylor, Shelley E., author
Prentice-Hall, 1997
Buku Teks
Callaghan, Jane, author
Learning Matters, 2011
Buku Teks
Albrecht, Stan L., author
Prentice-Hall, 1980
Buku Teks
Lindesmith, Alfred R., author
Holt, Rinehart and Winston, 1956
Buku Teks
Newcomb, Theodore M., author
Holt, Rinehart and Winston, 1961
Buku Teks