HARIS, A. H.; OTHMAN, M. R. Zulkifli Muhammad dan Perjuangan Politik Berteraskan Islam 1955-1964. Jurnal Usuluddin, [S. l.], v. 37, p. 83–116, 2013. Disponível em: https://ejournal.um.edu.my/index.php/JUD/article/view/7462. Acesso em: 3 may. 2024.