Saez, Eileen Elliott de
Facet Pub, 2002
Buku Teks
Bopp, Richard E.
Libraries Unlimited, 2001
Buku Teks
Cricket Liu; Jerry Peek; Russ Jones; Bryan Buus; Adrian Nye
O'Reilly, 1994
Buku Teks
edited by G. McLachlan
World Health Organization Regional Office for Europe, 1980
Buku Teks
edited by Mary Feeney
Bowker Sour Limited, 1994
Buku Teks