SBP Board of Consultants & Engineers
Small Business Publications, [199?]
Buku Referensi
Baumeister, Theodore
McGraw-Hill, 1958
Buku Referensi
editor, Charles A. Harper
McGraw-Hill, 1970
Buku Referensi
Meriam, J.L. (James L.)
John Wiley & Sons, 1976
Buku Referensi
Springer Singapore, 2019
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