LÓŃGĖ, O. (2016). The Yoruba ancient, traditional number systems and a Yoruba new decimal number system: Ancient: ewa,ogun, igba, egbewa, egbaawa, oke: new decimal ewa-alagbara. Original concepts.
Chicago-referens (17:e uppl.)LÓŃGĖ, Olu. The Yoruba Ancient, Traditional Number Systems and a Yoruba New Decimal Number System: Ancient: Ewa,ogun, Igba, Egbewa, Egbaawa, Oke: New Decimal Ewa-alagbara. Original concepts, 2016.
MLA-referens (9:e uppl.)LÓŃGĖ, Olu. The Yoruba Ancient, Traditional Number Systems and a Yoruba New Decimal Number System: Ancient: Ewa,ogun, Igba, Egbewa, Egbaawa, Oke: New Decimal Ewa-alagbara. Original concepts, 2016.
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