APA (7th ed.) Citation

Richter, S. D., & Leshchinsky, D. (1994). Hydraulically transported clay balls. [publisher not identified].

Chicago Style (17th ed.) Citation

Richter, Stephen D., and Dov Leshchinsky. Hydraulically Transported Clay Balls. [Place of publication not identified]: [publisher not identified], 1994.

MLA (9th ed.) Citation

Richter, Stephen D., and Dov Leshchinsky. Hydraulically Transported Clay Balls. [publisher not identified], 1994.