Cita APA (7a ed.)

Hillard, D., & Alexander, S. (2015). Mathematics Year 4. Hodder Education Group.

Cita Chicago Style (17a ed.)

Hillard, David, y Serena Alexander. Mathematics Year 4. Tenterden: Hodder Education Group, 2015.

Cita MLA (8a ed.)

Hillard, David, y Serena Alexander. Mathematics Year 4. Hodder Education Group, 2015.