APA (7th ed.) Citation

Wray, D. J. (1970). Water filtration optimization by geometric programming. [publisher not identified].

Chicago Style (17th ed.) Citation

Wray, Duane Jimmy. Water Filtration Optimization by Geometric Programming. [College Station, Tex.]: [publisher not identified], 1970.

MLA (9th ed.) Citation

Wray, Duane Jimmy. Water Filtration Optimization by Geometric Programming. [publisher not identified], 1970.