Williams, J. F. (1935). Hygiene and sanitation: The essentials of modern health care (3d ed., rev.). W.B. Saunders company.
Lua i Stíl Chicago (17ú heag.)Williams, Jesse Feiring. Hygiene and Sanitation: The Essentials of Modern Health Care. 3d ed., rev. Philadelphia ; London: W.B. Saunders company, 1935.
Lua MLA (8ú heag.)Williams, Jesse Feiring. Hygiene and Sanitation: The Essentials of Modern Health Care. 3d ed., rev. W.B. Saunders company, 1935.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.