SINGH, Vivek Raj. Economics of Social Marketing. Economic Journal of Nepal, [S. l.], v. 27, n. 4, p. 231–239, 2004. DOI: 10.3126/ejon.v27i4.73838. Disponível em: https://nepjol.info/index.php/EJON/article/view/73838. Acesso em: 31 jan. 2025.