Παραπομπή σε μορφή APA (7η εκδ.)

ebrary, Inc, & Okauru, I. O. (2012). Federal inland revenue service and taxation reforms in democratic Nigeria. Safari Books.

Παραπομπή σε μορφή Chicago (17η εκδ.)

ebrary, Inc, και Ifueko Omoigui Okauru. Federal Inland Revenue Service and Taxation Reforms in Democratic Nigeria. Ibadan, Nigeria: Safari Books, 2012.

Παραπομπή σε μορφή MLA (9th εκδ.)

ebrary, Inc, και Ifueko Omoigui Okauru. Federal Inland Revenue Service and Taxation Reforms in Democratic Nigeria. Safari Books, 2012.