GUNAWAN WIDJAJA; MOCHAMMAD ROUFAL; MARTIN MAURER M.MARPAUNG; M REYDHI SUWANDA. E – SIGNATURE DALAM E – KONTRAK. Jurnal Cakrawala Ilmiah, [S. l.], v. 1, n. 6, p. 1369–1382, 2022. DOI: 10.53625/jcijurnalcakrawalailmiah.v1i6.1504. Disponível em: https://mail.bajangjournal.com/index.php/JCI/article/view/1504. Acesso em: 5 jul. 2025.