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Number of items: 2.
Lubis, Idrus and Sulaiman, Abubakar and Umar, Said Mahmud and Sinaga, Mangatur and Shanty, Isnaini Leo (1993) Tata Bahasa Melayu Riau. Pusat Pembinaan dan Pengembangan Bahasa, Jakarta. ISBN 9794593001
Umar, Said Mahmud (1988) Hukum adat tambo. Proyek Penelitian dan Pengkajian Kebudayaan Nusantara, Pekanbaru.
