APA (7e ed.) Bronvermelding

DeVries, R., & Sales, C. (2011). Ramps & pathways: A constructivist approach to physics with young children. National Association for the Education of Young Children.

Chicago (17e ed.) Bronvermelding

DeVries, Rheta, en Christina Sales. Ramps & Pathways: A Constructivist Approach to Physics with Young Children. Washington, D.C: National Association for the Education of Young Children, 2011.

MLA (9e ed.) Bronvermelding

DeVries, Rheta, en Christina Sales. Ramps & Pathways: A Constructivist Approach to Physics with Young Children. National Association for the Education of Young Children, 2011.