APA (7th ed.) Citation

(1939). The american philosophical society year book 1938. The American Philosophical Society.

Chicago Style (17th ed.) Citation

The American Philosophical Society Year Book 1938. Philadelphia: The American Philosophical Society, 1939.

MLA (9th ed.) Citation

The American Philosophical Society Year Book 1938. The American Philosophical Society, 1939.

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