edited by Gordon Mclachlan
Oxford University Press, 1970
Buku Teks
Catherine Pope (Editor), Nicholas Mays (Editor)
Blackwell Publishing, 2006
Buku Teks
The Reader's Digest Association, Inc, 1998
Buku Teks SO
Hughes, Rebecca, contributing writher; Chasnoff, Ira J., consultan; Ellis, Jeffrey W., consultan; Fainman, Zachary S., consultan; McDermott, Teri J., consultan
Publications International , 1991
Buku Referensi
edited by Hoarst Noack
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Buku Teks