Judd, Charles M., author
Methuen, 1991
Buku Teks
by Claire Selltiz [and others]
Holt, Rinehart and Winston, 1959
Buku Teks
Lamont, Christopher K., author
Sage Publications Ltd., 2015
Buku Teks
Dunn, Dana S., author
Wiley-Blackwell, 2009
Buku Teks
Crano, William D., author
Lawrence Erlbaum Assossiate, 2002
Buku Teks