APA (7th ed.) Citation

Penzer, N. M. (1964). Steeple cups: Part 4.

Chicago Style (17th ed.) Citation

Penzer, N. M. Steeple Cups: Part 4. 1964.

MLA (9th ed.) Citation

Penzer, N. M. Steeple Cups: Part 4. 1964.

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