David Levinson, editor
Sage Publications, 2002
Buku Referensi
David Levinson, editor
Sage Publications, 2002
Buku Referensi
David Levinson, editor
Sage Publications, 2002
Buku Referensi
Felson, Marcus
Pine force Press, 1998
Buku Teks
Hickey, Thomas J., author
McGraw-Hill, 2012
Buku Teks