The figure is based on the ethnic classification presented in Ananta et al. 2015, which includes figures for every groups with "Malay" in their names as well as Jambi, Bengkulu, Serawai, Semendo peoples, but excludes figures for Palembang, Bangka, and Belitung peoples.[2] Ananta, Aris; Arifin, Evi Nurvidya; Hasbullah, M Sairi; Handayani, Nur Budi; Pramono, Agus (2015). Demography of Indonesia's Ethnicity. Institute of Southeast Asian Studies. ISBN978-981-4519-87-8.