Hamilton, Alexander
J. M. DENT & SONS, 1961
Buku Teks
Fenn, Percy T.
D. Appleton-Century, 1948
Buku Teks
Corwin, Edward S.
Holt, Rinehart and Winston, 1964
Buku Teks
Scaros, Constantinos E.
Jones and Bartlett Publishers, 2011
Buku Teks
Dumbauld, Edward
University of Oklahoma Press, 1946
Buku Teks