Pitale, R. (1982). Project appraisal technique (2nd.). Oxford & IBH Pub Co.
Lua i Stíl Chicago (17ú heag.)Pitale, R. Project Appraisal Technique. 2nd. New Delhi: Oxford & IBH Pub Co, 1982.
Lua MLA (9ú heag.)Pitale, R. Project Appraisal Technique. 2nd. Oxford & IBH Pub Co, 1982.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.