APA (7th ed.) Citation
(1989). Economic Papers 20 (1. ed.). Central Schools of Planning and Statistics.
Chicago Style (17th ed.) Citation
Economic Papers 20. 1. ed. Warsaw: Central Schools of Planning and Statistics, 1989.
MLA (9th ed.) Citation
Economic Papers 20. 1. ed. Central Schools of Planning and Statistics, 1989.
Warning: These citations may not always be 100% accurate.