Olofson, H. (2007). [A voice from many rivers/Su Gesalan nu nga Subaanen di Melaun Tinubigan: Central Subanen oral and written literature: review. Philippine Quarterly of Culture & Society.
Chicago-referens (17:e uppl.)Olofson, Harold. "[A Voice from Many Rivers/Su Gesalan Nu Nga Subaanen Di Melaun Tinubigan: Central Subanen Oral and Written Literature: Review." Philippine Quarterly of Culture & Society 2007.
MLA-referens (9:e uppl.)Olofson, Harold. "[A Voice from Many Rivers/Su Gesalan Nu Nga Subaanen Di Melaun Tinubigan: Central Subanen Oral and Written Literature: Review." Philippine Quarterly of Culture & Society, 2007.
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