Não informado. (1976). Quarterly oil statistics. Organization for Economic Co-operation and Development.
Παραπομπή σε μορφή Chicago (17η εκδ.)Não informado. Quarterly Oil Statistics. Paris: Organization for Economic Co-operation and Development, 1976.
Παραπομπή σε μορφή MLA (8th εκδ.)Não informado. Quarterly Oil Statistics. Organization for Economic Co-operation and Development, 1976.
Πρόσοχή: Οι παραπομπές μπορεί να μην είναι 100% ακριβείς.