Simpson, George Gaylord, author
Harcourt Brace & World, 1964
Buku Teks
The University of Mincigan, 1969
Buku Teks
Powell, G. Bingham, author
Pearson Education, 2015
Buku Teks
Tro, Nivaldo J., author
Thomson, Brooks/Cole, 2007
Buku Teks
Fitzgerald, C.P.
Oxford University Press, 1965
Buku Teks