Martin, D. J., & Janke, D. (1997). Elementary science methods: A constructivist approach. Delmar Publishers.
Cita Chicago (17th ed.)Martin, David Jerner, i Delmar Janke. Elementary Science Methods: A Constructivist Approach. Albany: Delmar Publishers, 1997.
Cita MLA (9th ed.)Martin, David Jerner, i Delmar Janke. Elementary Science Methods: A Constructivist Approach. Delmar Publishers, 1997.
Atenció: Aquestes cites poden no estar 100% correctes.