K N SINGH AND V.K. KUMAR. Result Demonstration- Purpose Process and Technique-1. Indian Journal of Extension Education, India, v. 1, n. 2, p. 92–101, 1965. Disponível em: https://epubs.icar.org.in/index.php/IJEE/article/view/159391. Acesso em: 5 jun. 2026.