HOFFMAN, N. S. (1977). A New World of Health. McGraw-Hill Book Company.
Lua i Stíl Chicago (17ú heag.)HOFFMAN, Norman S. A New World of Health. McGraw-Hill Book Company, 1977.
Lua MLA (8ú heag.)HOFFMAN, Norman S. A New World of Health. McGraw-Hill Book Company, 1977.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.