Kelley, Pearce Clement
Prentice-Hall, 1957
Buku Teks SO
Brown, Paul L.
Ronald Press, 1953
Buku Teks SO
Buskirk, Richard Hobart, 1927-
McGraw-Hill, 1979
Buku Teks SO
Richert, G. Henry
McGraw-Hill Book Co., Inc. , 1962
Buku Teks SO
Levy, Michael, 1950-
[Publisher not identified], 2001
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