APA (7th ed.) Citation

Wolf, E., & Smith, R. C. (1961). A press for Penn's pump.

Chicago Style (17th ed.) Citation

Wolf, Edwin, and Robert Chester Smith. A Press for Penn's Pump. 1961.

MLA (9th ed.) Citation

Wolf, Edwin, and Robert Chester Smith. A Press for Penn's Pump. 1961.

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