APA (7th ed.) Citation

Akkerman, S. F., & Bakker, A. (2011). Boundary Crossing and Boundary Objects. Review of educational research, 81(2), 132-169. https://doi.org/10.3102/0034654311404435

Chicago Style (17th ed.) Citation

Akkerman, Sanne F., and Arthur Bakker. "Boundary Crossing and Boundary Objects." Review of Educational Research 81, no. 2 (2011): 132-169. https://doi.org/10.3102/0034654311404435.

MLA (9th ed.) Citation

Akkerman, Sanne F., and Arthur Bakker. "Boundary Crossing and Boundary Objects." Review of Educational Research, vol. 81, no. 2, 2011, pp. 132-169, https://doi.org/10.3102/0034654311404435.