Cooper, J. 2. (201). Jump! London : Corgi Books.
Cita Chicago (17th ed.)Cooper, Jilly 218761. Jump! London : Corgi Books, 201.
Cita MLA (9th ed.)Cooper, Jilly 218761. Jump! London : Corgi Books, 201.
Atenció: Aquestes cites poden no estar 100% correctes.