BIRKENHOLZ, Robert J. Ripple Effects: 2012 Distinguished Lecture, American Association for Agricultural Education. Journal of Agricultural Education, [S. l.], v. 54, n. 1, p. 1–7, 2013. DOI: 10.5032/jae.2013.01001. Disponível em: https://jae-online.org/index.php/jae/article/view/1916. Acesso em: 30 apr. 2026.