Hurley, Patrick J., 1883-1963
Wadsworth, 1984
Buku Teks
Langer, Susanne K.
Dover, 1953
Buku Teks
Tidman, Paul
Wadsworth, 1999
Buku Teks
Hausman, Alan
Wadsworth and Cengage Learning, 2013
Buku Teks
Mates, Benson
Oxford University Press, 1965
Buku Teks