Armstrong, James W., author
Elements of mathematics
Macmillan, 1970
 Buku Teks
Strunk Jr., William
The elements of style
Macmillan Publishing Co., 1979
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Urwick, Lyndall F., author
The elements of administration
Harper & Brothers, 1960
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Converse, Paul Dulaney, 1889-, author
Elements of marketing
Prentice-Hall, 1958
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Piesse, E.L., author
The Elements of drafting
The Law Book Company Limited, 1976
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