Lua APA (7ú heag.)

Havighurst, R. J. (1972). Development tasks and education (3rd ed.). David McKay Company, Inc..

Lua i Stíl Chicago (17ú heag.)

Havighurst, Robert James. Development Tasks and Education. 3rd ed. New york: David McKay Company, Inc., 1972.

Lua MLA (8ú heag.)

Havighurst, Robert James. Development Tasks and Education. 3rd ed. David McKay Company, Inc., 1972.

Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.