Layder, Derek
Sage, 1994
Buku Teks
Goldthorpe, J. E., author
Cambridge University PRess, 1975
Buku Teks
Himes, Joseph S., author
Scott, Foresman and Company , 1968
Buku Teks
Goode, William J.
Tata McGraw-Hill, 1977
Buku Teks
Barry, Anne-Marie, author
SAGE Publications Ltd, 2016
Buku Teks