APA (7th ed.) Citation

Clements, D. H., & Sarama, J. (2014). Learning and teaching early math: The learning trajectories approach (2. ed.). Routledge.

Chicago Style (17th ed.) Citation

Clements, Douglas H., and Julie Sarama. Learning and Teaching Early Math: The Learning Trajectories Approach. 2. ed. New York, NY [u.a.]: Routledge, 2014.

MLA (9th ed.) Citation

Clements, Douglas H., and Julie Sarama. Learning and Teaching Early Math: The Learning Trajectories Approach. 2. ed. Routledge, 2014.