Παραπομπή σε μορφή APA (7η εκδ.)

Nyagura, L. M., & Riddell, A. (1993). Primary school achievement in English and mathematics in Zimbabwe: A multi-level analysis. Financial Sector Development Dept., World Bank.

Παραπομπή σε μορφή Chicago (17η εκδ.)

Nyagura, Levi M., και Abby Riddell. Primary School Achievement in English and Mathematics in Zimbabwe: A Multi-level Analysis. Washington, DC: Financial Sector Development Dept., World Bank, 1993.

Παραπομπή σε μορφή MLA (9th εκδ.)

Nyagura, Levi M., και Abby Riddell. Primary School Achievement in English and Mathematics in Zimbabwe: A Multi-level Analysis. Financial Sector Development Dept., World Bank, 1993.