Merritt, Eileen G., Stern, Marc J., Powell, Robert B., and Frensley, B. Troy. A systematic literature review to identify evidence-based principles to improve online environmental education. Retrieved from https://par.nsf.gov/biblio/10345506. Environmental Education Research 28.5 Web. doi:10.1080/13504622.2022.2032610.

Merritt, Eileen G., Stern, Marc J., Powell, Robert B., & Frensley, B. Troy. A systematic literature review to identify evidence-based principles to improve online environmental education. Environmental Education Research, 28 (5). Retrieved from https://par.nsf.gov/biblio/10345506. https://doi.org/10.1080/13504622.2022.2032610

Merritt, Eileen G., Stern, Marc J., Powell, Robert B., and Frensley, B. Troy. "A systematic literature review to identify evidence-based principles to improve online environmental education". Environmental Education Research 28 (5). Country unknown/Code not available. https://doi.org/10.1080/13504622.2022.2032610. https://par.nsf.gov/biblio/10345506.

@article{osti_10345506,
place = {Country unknown/Code not available}, title = {A systematic literature review to identify evidence-based principles to improve online environmental education}, url = {https://par.nsf.gov/biblio/10345506}, DOI = {10.1080/13504622.2022.2032610}, abstractNote = {}, journal = {Environmental Education Research}, volume = {28}, number = {5}, author = {Merritt, Eileen G. and Stern, Marc J. and Powell, Robert B. and Frensley, B. Troy}, }