APA (7th ed.) Citation

Ayres, V. L. (1938). Hybrid vigor in Gossypium species. [publisher not identified].

Chicago Style (17th ed.) Citation

Ayres, Victor Leo. Hybrid Vigor in Gossypium Species. (College Station, Texas): [publisher not identified], 1938.

MLA (9th ed.) Citation

Ayres, Victor Leo. Hybrid Vigor in Gossypium Species. [publisher not identified], 1938.