APA (7th ed.) Citation

Leffler, G. L. (1952). Seasonal changes in Pennsylvania business.

Chicago Style (17th ed.) Citation

Leffler, George Leland. Seasonal Changes in Pennsylvania Business. State College, 1952.

MLA (8th ed.) Citation

Leffler, George Leland. Seasonal Changes in Pennsylvania Business. 1952.

Warning: These citations may not always be 100% accurate.