St. Goar, J., and Lai, Y. Defining key developmental understandings for congruence proofs from a transformation perspective. Retrieved from https://par.nsf.gov/biblio/10292827. Mathematics Education Across Cultures: Proceedings of the 42nd Meeting of the North American Chapter of the International Group for the Psychology of Mathematics Education .

St. Goar, J., & Lai, Y. Defining key developmental understandings for congruence proofs from a transformation perspective. Mathematics Education Across Cultures: Proceedings of the 42nd Meeting of the North American Chapter of the International Group for the Psychology of Mathematics Education, (). Retrieved from https://par.nsf.gov/biblio/10292827.

St. Goar, J., and Lai, Y. "Defining key developmental understandings for congruence proofs from a transformation perspective". Mathematics Education Across Cultures: Proceedings of the 42nd Meeting of the North American Chapter of the International Group for the Psychology of Mathematics Education (). Country unknown/Code not available. https://par.nsf.gov/biblio/10292827.

@article{osti_10292827,
place = {Country unknown/Code not available}, title = {Defining key developmental understandings for congruence proofs from a transformation perspective}, url = {https://par.nsf.gov/biblio/10292827}, abstractNote = {}, journal = {Mathematics Education Across Cultures: Proceedings of the 42nd Meeting of the North American Chapter of the International Group for the Psychology of Mathematics Education}, author = {St. Goar, J. and Lai, Y.}, editor = {null} }