Karen Ball. (2019). "Leonardo Da Vinci (Young Reading Level 3) [Paperback] [Jan 01, 2010] NILL". Usborne.
Cita Chicago Style (17a ed.)Karen Ball. "Leonardo Da Vinci (Young Reading Level 3) [Paperback] [Jan 01, 2010] NILL". Usborne, 2019.
Cita MLA (9a ed.)Karen Ball. "Leonardo Da Vinci (Young Reading Level 3) [Paperback] [Jan 01, 2010] NILL". Usborne, 2019.
Precaución: Estas citas no son 100% exactas.