Cita APA (7th ed.)

Brook, F., & Helbrough, E. (2011). Camiones. Usborne Publishing Ltd.

Cita Chicago (17th ed.)

Brook, Felicity, i Emma Helbrough. Camiones. Londres: Usborne Publishing Ltd, 2011.

Cita MLA (9th ed.)

Brook, Felicity, i Emma Helbrough. Camiones. Usborne Publishing Ltd, 2011.