Gaya APA
Lester, E, I, A. (2017).
Project Management, Planning and Control (Seventh Edition).
United States of America:
Elsevier Ltd..
Gaya MLA
Lester, Eur, Ing, Albert.
"Project Management, Planning and Control".
Seventh Edition
United States of America:
Elsevier Ltd.,
2017.
eBook.