Corwin, Edward S.
Holt, Rinehart and Winston, 1964
Buku Teks
Scaros, Constantinos E.
Jones and Bartlett Publishers, 2011
Buku Teks
Fenn, Percy T.
D. Appleton-Century, 1948
Buku Teks
Corwin, Edward S.
Princeton University press, 1958
Buku Teks
introduction by Edward G. Smith
Barnes & Noble, 1966
Buku Teks