by Samuel H. Beer ... [et al.]
Random House, 1965
Buku Teks
Held, Colbert C.
Westview Press, 2014
Buku Teks
Russell, Anne
Prentive-Hall, 1982
Buku Teks
Ward, John, author
Routledge , 1997
Buku Teks
Sievers, Allen M., author
The Johns Hopkins University Press, 1974
Buku Teks