Carlton, K., & Parkinson, E. (1994). Physical sciences: A primary teacher's guide. Cassell.
Cita Chicago (17th ed.)Carlton, Kevin, i Eric Parkinson. Physical Sciences: A Primary Teacher's Guide. London ; New York: Cassell, 1994.
Cita MLA (8th ed.)Carlton, Kevin, i Eric Parkinson. Physical Sciences: A Primary Teacher's Guide. Cassell, 1994.
Atenció: Aquestes cites poden no estar 100% correctes.