Larsson, Gerhard, author
Avery, 1993
Buku Teks
edited by Philip M. Hauser and Leo F. Schnore
John Wiley & Sons, 1965
Buku Teks
Caminos, Horacio, author
MIT Press, 1980
Buku Teks
Edited by Wilbert E. Moore and Neil J. Smelser.
Prentice-Hall, 1966
Buku Teks
Bose, Ashish, author
Tata McGraw-Hill , 1978
Buku Teks