HEER, D. M. (1987). Society and population.--ed.2. Prentice Hall of India.
Lua i Stíl Chicago (17ú heag.)HEER, David M. Society and Population.--ed.2. New Delhi: Prentice Hall of India, 1987.
Lua MLA (9ú heag.)HEER, David M. Society and Population.--ed.2. Prentice Hall of India, 1987.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.