Cita APA (7th ed.)

Booker, G. (1980). Numeration. Curriculum Development Centre.

Cita Chicago (17th ed.)

Booker, George. Numeration. Canberra: Curriculum Development Centre, 1980.

Cita MLA (9th ed.)

Booker, George. Numeration. Curriculum Development Centre, 1980.

Atenció: Aquestes cites poden no estar 100% correctes.