Watson, Richard A., author
Harcourt, Brace and World, 1969
Buku Teks
Voice of American Forum Lectures, 1968
Buku Teks
Horwitz, Allan V., author
Oxford University Press, 2016
eBooks
Johnson, Michael D., author
Benjamin Cummings, 2001
Buku Teks
Starr, Cecie, author
Brooks/Cole, 2012
Buku Teks