SÁNCHEZ, Ana María. Employment and sales in companies and establishments of Tungurahua and Ambato. Bolentín de Coyuntura, [S. l.], n. 9, p. 14–15, 2016. Disponível em: https://revistas.uta.edu.ec/erevista/index.php/bcoyu/article/view/599. Acesso em: 22 jul. 2024.