Παραπομπή σε μορφή APA (7η εκδ.)

Olarewaju, V. I. (2018). Rocks: Their Beauty, Language And Roles As Resources of Economic Development. Obafemi Awolowo University Press Limited.

Παραπομπή σε μορφή Chicago (17η εκδ.)

Olarewaju, Victor I.O. Rocks: Their Beauty, Language And Roles As Resources of Economic Development. Obafemi Awolowo University Press Limited, 2018.

Παραπομπή σε μορφή MLA (9th εκδ.)

Olarewaju, Victor I.O. Rocks: Their Beauty, Language And Roles As Resources of Economic Development. Obafemi Awolowo University Press Limited, 2018.