Jabarkan Galeri dari Danau Toba dalam bahasa minangkabau

Toba, Sumatra, Indonesia – Volcano.oregonstate.edu Accessed 11 December 2005

Stanley H. Ambrose, Volcanic Winter, and Differentiation of Modern Humans Accessed 11 December 2005

Joel Achenbach, Who Knew, National Geographic Accessed 11 December 2005

(Lake Toba Ecosystem Management Plan) From laketoba.org