Παραπομπή APA

(1988). Agricultural productivity: Measurement and explanation. Washington, D.C: Resources for the Future.

Παραπομπή Chicago Style

Agricultural Productivity: Measurement and Explanation. Washington, D.C: Resources for the Future, 1988.

Παραπομπή MLA

Agricultural Productivity: Measurement and Explanation. Washington, D.C: Resources for the Future, 1988.

Πρόσοχή: Οι παραπομπές μπορεί να μην είναι 100% ακριβείς.