Agustiar, A. B., D. Masyitoh, I. D. Fibriana, A. S. Khumairoh, K. A. Rianti, N. Fitriani, M. Harissuddin, and H. A. Akmalia. “Phenetic Kinship Relationship of Apocynaceae Family Based on Morphological and Anatomical Characters”. BIOEDUSCIENCE, vol. 4, no. 2, Dec. 2020, pp. 113-9, doi:10.22236/j.bes/424945.