APA-ийн эшлэл(7 дахь хэвлэлт)

Eyo, E., Held, A., & Held, U. (1977). Two thousand years, nigerian art. Federal Dept. of Antiquities.

Чикаго-гийн эшлэл (17 дахь хэвлэлт)

Eyo, Ekpo, Andr Held, ба Ursula Held. Two Thousand Years, Nigerian Art. Lagos: Federal Dept. of Antiquities, 1977.

MLA -ийн эшлэл (9 дэх хэвлэлт)

Eyo, Ekpo, et al. Two Thousand Years, Nigerian Art. Federal Dept. of Antiquities, 1977.