APA (7th ed.) Citation

United States. Public Health Service. (1937). Illness and medical care in Puerto Rico. [s.n.].

Chicago Style (17th ed.) Citation

United States. Public Health Service. Illness and Medical Care in Puerto Rico. [Washington]: [s.n.], 1937.

MLA (9th ed.) Citation

United States. Public Health Service. Illness and Medical Care in Puerto Rico. [s.n.], 1937.