Harlen, W. (1983). New trends in primary school science education. Paris : Unesco.
Cita Chicago (17th ed.)Harlen, Wynne. New Trends in Primary School Science Education. Paris : Unesco, 1983.
Cita MLA (9th ed.)Harlen, Wynne. New Trends in Primary School Science Education. Paris : Unesco, 1983.
Atenció: Aquestes cites poden no estar 100% correctes.