McClelland, David Clarence
Vakils, Feffer and Simon Private, 1961
Buku Teks
Luard, Evan
Macmillan, 1990
Buku Teks
Tomasson, Richard F.
Random Home, 1970
Buku Teks
Nakane, Chie
University of California Press, 1970
Buku Teks
Wicks, Rollo E.
N.Y. State Univ. of New York , 1958
Buku Teks