Berger, R., & Hänze, M. [ca. 2009]. Comparison of two small group learning methods in 12 th grade physics classes focusing on intrinsic motivation and academic performance [Electronic]. International Journal of Science Education, (31 (2009) 11 ; 1511-1527), 31 (2009) 11 ; 1511-1527. https://doi.org/10.1080/09500690802116289

BERGER, Roland und HÄNZE, Martin, 2009. Comparison of two small group learning methods in 12 th grade physics classes focusing on intrinsic motivation and academic performance. International Journal of Science Education. 2009. No. 31 (2009) 11 ; 1511-1527, p. 31 (2009) 11 ; 1511-1527. DOI 10.1080/09500690802116289.

Berger, R., und M. Hänze. „Comparison of two small group learning methods in 12 th grade physics classes focusing on intrinsic motivation and academic performance“. International Journal of Science Education, electronic, Nr. 31 (2009) 11 ; 1511-1527, SSOAR, 2009, S. 31 (2009) 11 ; 1511-1527, https://doi.org/10.1080/09500690802116289.

Berger, Roland/Hänze, Martin: Comparison of two small group learning methods in 12 th grade physics classes focusing on intrinsic motivation and academic performance, International Journal of Science Education 2009, 31 (2009) 11 ; 1511-1527.

Berger, R. und Hänze, M. (2009), „Comparison of two small group learning methods in 12 th grade physics classes focusing on intrinsic motivation and academic performance“, International Journal of Science Education, SSOAR, Mannheim, No. 31 (2009) 11 ; 1511-1527, S. 31 (2009) 11 ; 1511-1527.