150 Tahun Pembunuhan J.W.W. Birch: Satu Penelitian terhadap Hubungan antara  Ngah Ibrahim dengan J.W.W. Birch. MINDEN Journal of History and Archaeology, [S. l.], v. 3, n. 1, p. 123–148, 2026. Disponível em: https://ejournal.usm.my/mjha/article/view/6013.. Acesso em: 30 may. 2026.