Izgi-Onbasili, Umit. “Investigation of the Effects of Out-of-School Learning Environments on the Attitudes and Opinions of Prospective Classroom Teachers about Renewable Energy Sources”. Journal of Education in Science, Environment and Health, vol. 6, no. 1, Jan. 2020, pp. 35-52, https://jeseh.net/index.php/jeseh/article/view/282.