Conason, Joe
Man of the world : the further adventures of Bill Clinton
Simon & Schuster, 2016
 Buku Teks
Cassell's encyclopaedia of world literature; Vol. II
edited by S.H. Steinberg
Funk & Wagnalls, 1954
 Buku Referensi
Williamson, Bill
The temper of the times: British Society since world war II/Bill Williamson
Oxford Basil Balckwell 1990,
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Harvey, Clare G.
The encyclopaedia of flower remedies: the healing power of flower essences from around the world
Thorsons, 1995
 Buku Referensi
Lumley, John L.
Engines: An Introduction
Cambridge University Press, 1999
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