Friedman, Lawrence M., 1930-, author
Russel Sage Foundation, 1977
Buku Teks
Leaf, Murray J.
Columbia University Press, 1979
Buku Teks
van der Dussen, Jan
Springer, 2012
eBooks
edited, Nathan Reingold; edited, Ida H. Reingold
University of Chicago Press, 1981
Buku Referensi
Radin, Max
St Paul Minn, 1936
Buku Teks