Firdaus, Firdaus (2022) Halal marketing elements as determinants of consumer product purchase decisions. INDONESIAN JOURNAL OF HALAL, 5 (1). ISSN 2656-4963

Firdaus, Firdaus (2022) The role of the Malay customary institution in off-court divorce mediation: a case study in Rantau Pandan, Jambi. AL-RISALAH: FORUM KAJIAN HUKUM DAN SOSIAL KEMASYARAKATAN, 20 (1). ISSN 2540-9522

Firdaus, Firdaus and Yusnita, Eva (2021) Optimalisasi peran penegak hukum dalam perlindungan terhadap anak-anak korban kekerasan di Kota Padang. MIMBAR HUKUM UNIVERSITAS GADJAH MADA, 3 (1).

Firdaus, Firdaus (2021) Polygamy permits for business reasons (analysis of Sawahlunto religious court ruling number: 045/ Pdt.G/ 2018/ PA.SWL). JURNAL ILMIAH SYARI’AH, 20 (2).

Kustati, Martin and Firdaus, Firdaus (2020) The role of minangkabau ulamas in the islamization of the kongdoms of gowa and tallo. THE JOURNAL OF SOCIAL SCIENCES RESEARCH, 6 (4). ISSN 2411-9458

Firdaus, Firdaus (2020) The role of substantive understanding approach in the changes of fiqh. AL-‘ADALAH, 17 (1).

Firdaus, Firdaus (2019) One mosque, two qiblahs: understanding the difference in qiblah direction of the Nagari Suayan Mosque in West Sumatera, Indonesia. JOURNAL OF INDONESIAN ISLAM, 13 (1).

Firdaus, Firdaus and Salihin, Nurus (2015) Al- Qawaid Al Fiqhiyyah ; Membahas Kaidah-Kaidah Pokok Dan Populer Fiqh. Imam Bonjol Press, Padang. ISBN 978-979-1389-72-3

Firdaus, Firdaus (2015) Transliterasi dan terjemahan Naskah Galah Salapan. Dinas Kebudayaan Pemrov. Sumbar, Padang.

Firdaus, Firdaus (2014) Sejarah Pendidikan Islam di Minagkabau Abad XVII-XVIII. Pusat Penelitian UIN Imam Bonjol Padang, Padang. ISBN 978-979-1389-53-2