APA (7th ed.) Citation

Harbaugh, W. H., Huidekoper, R. S., United States. Bureau of Animal Industry, Michener, C. B., & Pearson, L. (2007). Special Report on Diseases of the Horse. Project Gutenberg.

Chicago Style (17th ed.) Citation

Harbaugh, W. H., Rush Shippen Huidekoper, United States. Bureau of Animal Industry, Charles B. Michener, and Leonard Pearson. Special Report on Diseases of the Horse. Project Gutenberg, 2007.

MLA (9th ed.) Citation

Harbaugh, W. H., et al. Special Report on Diseases of the Horse. Project Gutenberg, 2007.

Warning: These citations may not always be 100% accurate.