edited by Gail Elizabeth Wyatt, Gloria Johnson Powell
Sage Publications, 1988
Buku Teks
Sage Publications, 1988
Buku Teks
Hobbs, Christopher J., author
W.B. Saunders , 2001
Buku Referensi
Paris Goodyear-Brown, editor
John Wiley & Sons, 2012
Buku Teks
Merrick, Dave
Routledge, 1996
Buku Teks