Fadri, R., K. Sayuti, N. Nazir, and I. Suliansyah. “The Effect of Temperature and Roasting Duration on Physical Characteristics and Sensory Quality Of Singgalang Arabica Coffee (Coffea Arabica) Agam Regency”. Journal of Applied Agricultural Science and Technology, Vol. 3, no. 2, Aug. 2019, pp. 189-01, doi: https://doi.org/10.32530/jaast.v3i2.117.