Hacker, Diana
A writer's reference
Bedford Books of St. Martin?s Press, 1995
 Buku Teks
Hirschman, Albert O.
Development projects observed
The Brookings Institution, 1967
 Buku Teks
Breit, William
Readings in microeconomics / William Breit, Harold M. Hochman, Edward Saueracker
Times Mirror/Mosby College Pub., 1986
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Harvey, Greg
Exel for dummies / by Greg Harvey
IDG Books, 1994
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Harvey, Chris
Classic cars/Chris Harvey
Chancellor Press, 1987
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