APA-referens (7:e uppl.)

de Villa, R. F. (2004). Invented spelling ability and word recognition performance in Filipino among kindergarten pupils.

Chicago-referens (17:e uppl.)

de Villa, Rouella F. Invented Spelling Ability and Word Recognition Performance in Filipino Among Kindergarten Pupils. 2004.

MLA-referens (9:e uppl.)

de Villa, Rouella F. Invented Spelling Ability and Word Recognition Performance in Filipino Among Kindergarten Pupils. 2004.

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