Cita APA (7th ed.)
Ruse, C. Opportunities: Elementary : Mini-Dictionary. Pearson.
Cita Chicago (17th ed.)
Ruse, Christina. Opportunities: Elementary : Mini-Dictionary. Harlow, Inglaterra: Pearson.
Cita MLA (9th ed.)
Ruse, Christina. Opportunities: Elementary : Mini-Dictionary. Pearson.
Atenció: Aquestes cites poden no estar 100% correctes.