Mears, Leon A., author
GadjahMada University Press, 1981
Buku Teks
edited by W. W. Cooper, H. J. Leavitt [and] M. W. Shelly II
John Wiley & Sons, 1964
Buku Teks
Bruyn, Severyn T., author
The University of Michigan Press, 2000
Buku Teks
Brennan, Teresa, author
Routledge, 2000
Buku Teks
Rosen, Andrew S., author
Kaplan, 2011
Buku Teks