APA (7th ed.) Citation

Neumann, A., & Neumann, S. (2009). New Standards for GD&T. Machine Design, 81(20), 36.

Chicago Style (17th ed.) Citation

Neumann, Al, and Scott Neumann. "New Standards for GD&T." Machine Design 81, no. 20 (2009): 36.

MLA (9th ed.) Citation

Neumann, Al, and Scott Neumann. "New Standards for GD&T." Machine Design, vol. 81, no. 20, 2009, p. 36.