Cita APA (7th ed.)
Open University. Handbook [Open University]: 1. Open University.
Cita Chicago (17th ed.)
Open University. Handbook [Open University]: 1. Milton Keynes, Inglaterra: Open University.
Cita MLA (9th ed.)
Open University. Handbook [Open University]: 1. Open University.
Atenció: Aquestes cites poden no estar 100% correctes.