lester, a. (1982). project planning and control. butterworth & co publishers Ltd.
Chicago-čujuhus (17. p.)lester, albert. Project Planning and Control. london: butterworth & co publishers Ltd, 1982.
MLA-čujuhus (9. p.)lester, albert. Project Planning and Control. butterworth & co publishers Ltd, 1982.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.