Cita APA

Blough, G. O., & Schwartz, J. (1990). Elementary school science and how to teach it (8th ed.). Fort Worth: Holt.

Chicago Style Citation

Blough, Glenn Orlando., i Julius Schwartz. Elementary School Science and How to Teach It. 8th ed. Fort Worth: Holt, 1990.

Cita MLA

Blough, Glenn Orlando., i Julius Schwartz. Elementary School Science and How to Teach It. 8th ed. Fort Worth: Holt, 1990.