Παραπομπή APA

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

Παραπομπή Chicago Style

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

Παραπομπή MLA

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

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