Dewi Anggraini, E., S. Karimi, I. Indrawari, y E. Ridwan. «Revealed Preference in President Election 2019 in Padang City West Sumatra Province». Opción, Vol. 35, agosto de 2019, pp. 1321-39, https://produccioncientificaluz.org/index.php/opcion/article/view/31630.