Powell, Robert B., Stern, Marc J., and Frensley, Brandon Troy. Which approaches are associated with better outcomes? Evidence from a national study of environmental education field trip programs for adolescent youth in the United States. Retrieved from https://par.nsf.gov/biblio/10434315. Environmental Education Research 29.3 Web. doi:10.1080/13504622.2022.2145270.

Powell, Robert B., Stern, Marc J., & Frensley, Brandon Troy. Which approaches are associated with better outcomes? Evidence from a national study of environmental education field trip programs for adolescent youth in the United States. Environmental Education Research, 29 (3). Retrieved from https://par.nsf.gov/biblio/10434315. https://doi.org/10.1080/13504622.2022.2145270

Powell, Robert B., Stern, Marc J., and Frensley, Brandon Troy. "Which approaches are associated with better outcomes? Evidence from a national study of environmental education field trip programs for adolescent youth in the United States". Environmental Education Research 29 (3). Country unknown/Code not available. https://doi.org/10.1080/13504622.2022.2145270. https://par.nsf.gov/biblio/10434315.

@article{osti_10434315,
place = {Country unknown/Code not available}, title = {Which approaches are associated with better outcomes? Evidence from a national study of environmental education field trip programs for adolescent youth in the United States}, url = {https://par.nsf.gov/biblio/10434315}, DOI = {10.1080/13504622.2022.2145270}, abstractNote = {}, journal = {Environmental Education Research}, volume = {29}, number = {3}, author = {Powell, Robert B. and Stern, Marc J. and Frensley, Brandon Troy}, }