Moreland, Canoll C.
Oceana Publications, 1957
Buku Teks
Breger, Marshall J.
Oxford University Press, 2015
Buku Teks
Mayers, Lewis
Harper & Brothers, 1955
Buku Teks
Garth, Bryant
Sijthoff and Noordhoff, 1980
Buku Teks
Freund, Paul A.
Harvard University Press, 1974
Buku Teks