Ballada, M. Q. (1972). Improving mathematical skills through science concepts.
Cita Chicago (17th ed.)Ballada, Melquiades Q. Improving Mathematical Skills Through Science Concepts. 1972.
Cita MLA (9th ed.)Ballada, Melquiades Q. Improving Mathematical Skills Through Science Concepts. 1972.
Atenció: Aquestes cites poden no estar 100% correctes.