APA (7th ed.) Citation

Buckingham, E., & Ryffel, H. H. (1981). Design of worm and spiral gears. Buckingham Ass.

Chicago Style (17th ed.) Citation

Buckingham, Earle, and Henry H. Ryffel. Design of Worm and Spiral Gears. Springfield: Buckingham Ass, 1981.

MLA (9th ed.) Citation

Buckingham, Earle, and Henry H. Ryffel. Design of Worm and Spiral Gears. Buckingham Ass, 1981.