Karen Ball. (2019). "Leonardo Da Vinci (Young Reading Level 3) [Paperback] [Jan 01, 2010] NILL". Usborne.
Chicago Style (17th ed.) CitationKaren Ball. "Leonardo Da Vinci (Young Reading Level 3) [Paperback] [Jan 01, 2010] NILL". Usborne, 2019.
ציטוט MLAKaren Ball. "Leonardo Da Vinci (Young Reading Level 3) [Paperback] [Jan 01, 2010] NILL". Usborne, 2019.
אזהרה: ציטוטים אלה לעיתים לא מדויקים ב 100%.