Παραπομπή σε μορφή APA (7η εκδ.)

Allen, D. H. (1991). Economic evaluation of projects: A guide (3rd ed.). Institution of Chemical Engineers.

Παραπομπή σε μορφή Chicago (17η εκδ.)

Allen, Derek H. Economic Evaluation of Projects: A Guide. 3rd ed. Rugby, Warwichshire: Institution of Chemical Engineers, 1991.

Παραπομπή σε μορφή MLA (9th εκδ.)

Allen, Derek H. Economic Evaluation of Projects: A Guide. 3rd ed. Institution of Chemical Engineers, 1991.