Turk, J. (1989). Home study experiments to accompany Environmental Science (4th.). Harcourt Brace.
Lua i Stíl Chicago (17ú heag.)Turk, Jonathan. Home Study Experiments to Accompany Environmental Science. 4th. New York: Harcourt Brace, 1989.
Lua MLA (9ú heag.)Turk, Jonathan. Home Study Experiments to Accompany Environmental Science. 4th. Harcourt Brace, 1989.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.