(en) Schlegel, H., 1879. Note 18 on Strix inexspectata. Notes from the Rijksmuseum van Natuurlijke Historie. 1 p.50 BHL, ,51
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(en) Bruce, M.D. & Marks, J.S., 2018. Minahasa Masked-owl (Tyto inexspectata). In: del Hoyo, J. et al. (eds.). Handbook of the Birds of the World Alive. Lynx Edicions, Barcelona. (retrieved from https://www.hbw.com/node/54927 on 26 October 2018).
