University of Missouri Press, 1970
Buku Teks
Batten,T. R., author
Oxford University Press, 1978
Buku Teks
Brody, Ralph
Human Science Press, 1982
Buku Teks
editors, Fred M. Cox ... [and others]
F.E. Peacock, 1977
Buku Teks
edited by Ilona Burchroth, Chris Parkin
Learning Matters, 2010
Buku Teks