APA (7th ed.) Zitazioa

lester, a. (1982). project planning and control. butterworth & co publishers Ltd.

Chicago Style (17th ed.) Zitazioa

lester, albert. Project Planning and Control. london: butterworth & co publishers Ltd, 1982.

MLA (9th ed.) Zitazioa

lester, albert. Project Planning and Control. butterworth & co publishers Ltd, 1982.