Williamson, John B., author
[Publisher not identified], 1977
Buku Teks
Goldthorpe, John H., author
Oxford University Press, 2000
Buku Teks
Neuman, William Lawrence, 1950-, author
Allyn and Bacon, 1994
Buku Teks
Neuman, William Lawrence, 1950-, author
Pearson/Allyn and Bacon, 2006
Buku Teks
McGraw-Hill, 2012
Buku Teks