Johansen,John H. (1990). American Education: An introduction to teaching (6th ed.). WCB.
Lua i Stíl Chicago (17ú heag.)Johansen,John H. American Education: An Introduction to Teaching. 6th ed. U.S.A: WCB, 1990.
Lua MLA (9ú heag.)Johansen,John H. American Education: An Introduction to Teaching. 6th ed. WCB, 1990.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.