Research and Education Association & Fogiel, M. (1992). The economics problem solver: A complete solution guide to any textbook. Research and Education Association.
Παραπομπή σε μορφή Chicago (17η εκδ.)Research and Education Association και M. Fogiel. The Economics Problem Solver: A Complete Solution Guide to Any Textbook. New Jersey: Research and Education Association, 1992.
Παραπομπή σε μορφή MLA (8th εκδ.)Research and Education Association και M. Fogiel. The Economics Problem Solver: A Complete Solution Guide to Any Textbook. Research and Education Association, 1992.
Πρόσοχή: Οι παραπομπές μπορεί να μην είναι 100% ακριβείς.