APA ציטוט

RIDGLEY, D. C. (1938). Influence Of Geographiiiy On Our Economic Life Douglas C. Ridgley And Sidney E. Ekblaw. The Gregg.

Chicago Style (17th ed.) Citation

RIDGLEY, Douglas C. Influence Of Geographiiiy On Our Economic Life Douglas C. Ridgley And Sidney E. Ekblaw. The Gregg, 1938.

ציטוט MLA

RIDGLEY, Douglas C. Influence Of Geographiiiy On Our Economic Life Douglas C. Ridgley And Sidney E. Ekblaw. The Gregg, 1938.