Turk, J. (1989). Home study experiments to accompany Environmental Science (4th.). Harcourt Brace.
Chicago-referens (17:e uppl.)Turk, Jonathan. Home Study Experiments to Accompany Environmental Science. 4th. New York: Harcourt Brace, 1989.
MLA-referens (9:e uppl.)Turk, Jonathan. Home Study Experiments to Accompany Environmental Science. 4th. Harcourt Brace, 1989.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.