Armstrong, James W., author
Elements of mathematics
Macmillan, 1970
 Buku Teks
Strunk Jr., William
The elements of style
Macmillan Publishing Co., 1979
 Buku Teks
Palfremen, David, author
Elements of banking
Pitman, 1988
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Branch, Alan E., author
The Elements of shipping
Chapman & Hall, 1979
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Urwick, Lyndall F., author
The elements of administration
Harper & Brothers, 1960
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