Hall, John W., author
Yale University Press, 1974
Buku Teks
Dell Publishing Co., 1963
Buku Teks
Taylor, Alice, author
Oxford University Press, 2016
eBooks
Storey, R.L., author
Simon & Schuster , 1994
Buku Referensi
Lyon, Bryce, author
Harper and Brothers, 1960
Buku Teks