APA (7e ed.) Bronvermelding

Não informado. (1968). QUARTERLY ECONOMIC REVIEW COLOMBIA, ECUADOR. Economist Intelligence Unit.

Chicago (17e ed.) Bronvermelding

Não informado. QUARTERLY ECONOMIC REVIEW COLOMBIA, ECUADOR. London: Economist Intelligence Unit, 1968.

MLA (8e ed.) Bronvermelding

Não informado. QUARTERLY ECONOMIC REVIEW COLOMBIA, ECUADOR. Economist Intelligence Unit, 1968.

Let op: Deze citaties zijn niet altijd 100% accuraat.