Le Brefon, Preston P.
General administration planning and implementation Preston P. Le Brefon
Holt, Rinehart and Winston, 1965
 Buku Teks
Le Breton, Preston P.
Planning theory / Preston P. Le Breton
Prentice-Hall, 1961
 Buku Teks
Le Breton, Preston P.
Planning theory by Preston P. Le Breton and Dale A. Henning.
Englewood Cliffs, 1961
 Buku Teks
Walters, Jack Edward
Basic administration; the process of planning, organizing, managing, appraising, and controlling
Littlefield, Adams, 1959
 Buku Teks
Bryson, John A., author
Business administration
American Institute of Banking, 1959
 Buku Teks
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