Παραπομπή σε μορφή APA (7η εκδ.)

Ren, R., & Chen, K. (1995). An expenditure-based bilateral comparison of gross domestic product between China and the United States. World Bank.

Παραπομπή σε μορφή Chicago (17η εκδ.)

Ren, Ruo'en, και Kai Chen. An Expenditure-based Bilateral Comparison of Gross Domestic Product Between China and the United States. Washington, DC: World Bank, 1995.

Παραπομπή σε μορφή MLA (9th εκδ.)

Ren, Ruo'en, και Kai Chen. An Expenditure-based Bilateral Comparison of Gross Domestic Product Between China and the United States. World Bank, 1995.