Adams, James E.
Wiley-Blackwell, 2009
Buku Teks
Fischer, Hermann
Cambridge University Press, 2010
eBooks
Balckwell Publishers, 1996
Buku Teks
Otis, William Bradley
Barnes & Noble, 1939
Koleksi Publik
Needleman, Morris H.
Barnes & Noble, 1939
Koleksi Publik