WAHL, S. V. Invesment appraisal and economic evaluation of mining enterprise. Gulf Publication Co.
Chicago-referens (17:e uppl.)WAHL, Siesfried Von. Invesment Appraisal and Economic Evaluation of Mining Enterprise. Gulf Publication Co.
MLA-referens (8:e uppl.)WAHL, Siesfried Von. Invesment Appraisal and Economic Evaluation of Mining Enterprise. Gulf Publication Co.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.