Muhammad Fiqqy Fachrazi, Fiqqy and Dr. Ir. Zahrul Umar, Dipl.He, Zahrul and Embun Sari Ayu, ST , MT, Embun (2023) Analisa Dimensi Sungai Batang Ulakan Kecamatan VII Koto Sungai Sarik. Diploma thesis, Universitas Bung Hatta.