APA (7th ed.) Citation

Frumkin, M. (1948). Early history of patents for invention.

Chicago Style (17th ed.) Citation

Frumkin, Maximilian. Early History of Patents for Invention. 1948.

MLA (9th ed.) Citation

Frumkin, Maximilian. Early History of Patents for Invention. 1948.

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