senior editors: Matthew A. Fuller, Martha Sajatovic
Lexi-Comp Inc, 2009
Buku Referensi
Lippincott Williams & Wilkins, 2006
Buku Referensi
Griggs, Barbara, author
Pan Books, 1995
Buku Referensi
editors, Arunabha Ray, Kavita Gulati
I.K. International Publishing House Pvt.Ltd., 2010
Buku Teks
This Bookler is reprinted and distributed by The Missouri Institute of Cooperatives
American Institute of Cooperation , 1983
Buku Teks