APA (7th ed.) Citation

Welch, B. E. (1954). Vitamin B₁₂ and unidentified factors in poultry nutrition. [publisher not identified].

Chicago Style (17th ed.) Citation

Welch, Billy E. Vitamin B₁₂ and Unidentified Factors in Poultry Nutrition. [College Station, Tex.]: [publisher not identified], 1954.

MLA (9th ed.) Citation

Welch, Billy E. Vitamin B₁₂ and Unidentified Factors in Poultry Nutrition. [publisher not identified], 1954.