APA (7th ed.) Citation

United States. Bureau of Dairy Industry, United States. Agricultural Research Service. Dairy Husbandry Research Branch, & United States. Agricultural Research Service. (1925). Dairy-herd-improvement-association letter. Agricultural Research Service.

Chicago Style (17th ed.) Citation

United States. Bureau of Dairy Industry, United States. Agricultural Research Service. Dairy Husbandry Research Branch, and United States. Agricultural Research Service. Dairy-herd-improvement-association Letter. Washington: Agricultural Research Service, 1925.

MLA (9th ed.) Citation

United States. Bureau of Dairy Industry, et al. Dairy-herd-improvement-association Letter. Agricultural Research Service, 1925.