Louise Spilsbury. (2017). Great Junior Encyclopedia - Inventions (2013.). Parragon Publication.
Cita Chicago (17th ed.)Louise Spilsbury. Great Junior Encyclopedia - Inventions. 2013. Parragon Publication, 2017.
Cita MLA (9th ed.)Louise Spilsbury. Great Junior Encyclopedia - Inventions. 2013. Parragon Publication, 2017.
Atenció: Aquestes cites poden no estar 100% correctes.