APA (7th ed.) Zitazioa
Mazeel, M. (2010). Petroleum fiscal systems and contracts. Diplomica Verlag.
Chicago Style (17th ed.) Zitazioa
Mazeel, Muhammed. Petroleum Fiscal Systems and Contracts. Hamburg: Diplomica Verlag, 2010.
MLA (9th ed.) Zitazioa
Mazeel, Muhammed. Petroleum Fiscal Systems and Contracts. Diplomica Verlag, 2010.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.