Cita APA (7th ed.)
Organisation for economic co-operation and development (OECD). (1964). Mathematics to-day: A guide for teachers (1a.ed.). Fehr, Howard F..
Cita Chicago (17th ed.)
Organisation for economic co-operation and development (OECD). Mathematics To-day: A Guide for Teachers. 1a.ed. París: Fehr, Howard F., 1964.
Cita MLA (9th ed.)
Organisation for economic co-operation and development (OECD). Mathematics To-day: A Guide for Teachers. 1a.ed. Fehr, Howard F., 1964.
Atenció: Aquestes cites poden no estar 100% correctes.