Haworth Press, 1992
Buku Referensi
Okta Reni Azrina RA, author
Fakultas Ilmu Pengetahuan dan Budaya Universitas Indonesia, 2019
UI - Tesis Membership
Lynch, Gordon, author
Blackwell Publishing, 2005
Buku Teks
edited by Bill Katz
Haworth Press , 1991
Buku Teks
edited by Corey K. Creekmur, Alexander Doty
Cassell, 1995
Buku Teks