Gaya APA
O'Neil, A. (1997).
I wonder why : vultures are bald and other questions about birds (Ed. 3).
London:
Kingfisher Publication.
Gaya MLA
O'Neil, Amanda.
"I wonder why : vultures are bald and other questions about birds".
Ed. 3
London:
Kingfisher Publication,
1997.
Text.