Smith, Reginald Heber
Petterson Smith, 1972
Buku Teks
Moreland, Canoll C., author
Oceana Publications, 1957
Buku Teks
Breger, Marshall J., author
Oxford University Press, 2015
Buku Teks
Mayers, Lewis
Harper & Brothers, 1955
Buku Teks
Garth, Bryant
Sijthoff and Noordhoff, 1980
Buku Teks