Cambridge University Press, 2017
eBooks
Dupuy
Sijthoff & Noordhoff, 1978
Buku Teks
Kail, Robert V., author
W.H. Freeman, c1985
Buku Teks
Forsythe, David P., 1941-, author
Cambridge University Press, 2000
Buku Teks
edited by Brian Galligan and Charles Samford
Federation Press, 1977
Buku Teks