Steve Parker. (2008). Great Junior Encyclopedia - Our World (2013.). Parragon Publication.
Cita Chicago (17th ed.)Steve Parker. Great Junior Encyclopedia - Our World. 2013. Parragon Publication, 2008.
Cita MLA (9th ed.)Steve Parker. Great Junior Encyclopedia - Our World. 2013. Parragon Publication, 2008.
Atenció: Aquestes cites poden no estar 100% correctes.