Conant, James B., author
Oxford University Press, 1946
Buku Teks
Regan, William
Harper & Row, Publishers, 1970
Buku Teks
Bestor, Arthur
Knopf, 1956
Buku Teks
Grambs, Jean D.
Holt, Rinehart and Winston, 1964
Buku Teks
Johns, Roe L.
Prentice-Hall, 1975
Buku Teks