Morgan, M. (1969). Population and food supply. Collins.
Lua i Stíl Chicago (17ú heag.)Morgan, Michael. Population and Food Supply. London: Collins, 1969.
Lua MLA (9ú heag.)Morgan, Michael. Population and Food Supply. Collins, 1969.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.