TAUFIQ, Wahyu; SANTOSO, Dian Rahma. Buku Ajar Learning Advanced English Grammar. Umsida Press, [S. l.], p. 1–129, 2021. DOI: 10.21070/2020/978-623-6833-78-0. Disponível em: https://press.umsida.ac.id/index.php/umsidapress/article/view/978-623-6833-78-0. Acesso em: 21 jun. 2025.