APA-referens (7:e uppl.)

Friedl, A. E. (2001). Teaching science to children: An inquiry approach (5th ed.). McGraw-Hill.

Chicago-referens (17:e uppl.)

Friedl, Alfred E. Teaching Science to Children: An Inquiry Approach. 5th ed. Boston: McGraw-Hill, 2001.

MLA-referens (9:e uppl.)

Friedl, Alfred E. Teaching Science to Children: An Inquiry Approach. 5th ed. McGraw-Hill, 2001.