Gans-Morse, Jordan, author
Cambridge University Press, 2017
Buku Teks
Belov, Fedor
Routledge & Paul Kegan , 1956
Buku Teks
Salisbury, Harrison E., author
Atheneum, 1965
Buku Teks
Boilard, Steve D.
Harcourt Brace College Publisher, 1988
Buku Teks
Ploss, Sidney I
Princenton University Press, 1965
Buku Teks