APA (7th ed.) Citation

Gentzsch, E. P. (1968). Nutritional factors limiting forage yields in Houston black clay. [publisher not identified].

Chicago Style (17th ed.) Citation

Gentzsch, Enrique Pedro. Nutritional Factors Limiting Forage Yields in Houston Black Clay. [College Station, Tex.]: [publisher not identified], 1968.

MLA (9th ed.) Citation

Gentzsch, Enrique Pedro. Nutritional Factors Limiting Forage Yields in Houston Black Clay. [publisher not identified], 1968.