Sika has the following consonant phonemes:4
Sika has the following vowel phonemes:5
Lewis, Ε. D.; Grimes, Charles E. (1995). "Sika". In Tryon, Darrell T. (ed.). Comparative Austronesian Dictionary: An Introduction to Austronesian Studies. Berlin: Walter de Gruyter. ISBN 3-1108-8401-1. 3-1108-8401-1 ↩
Gil, David (2015). "The Mekong-Mamberamo linguistic area". In N. J. Enfield; Bernard Comrie (eds.). Languages of Mainland Southeast Asia: The State of the Art. Walter de Gruyter GmbH & Co KG. p. 334. ISBN 978-1-5015-0168-5. 978-1-5015-0168-5 ↩