Cite

"Peep! Peep! Peep!" cried the baby goldfinches

MLA

Barney, Maginel Wright, 1877-1966. "Peep! Peep! Peep!" cried the baby goldfinches. https://collections.library.yale.edu/catalog/2008220.

APA, 6th edition

Barney, Maginel Wright, 1877-1966. ["Peep! Peep! Peep!" cried the baby goldfinches]. https://collections.library.yale.edu/catalog/2008220.