Cite

1. Barn swallow. 2. Female. 3. White-bellied S. 4. Bank S

MLA

1. Barn Swallow. 2. Female. 3. White-Bellied S. 4. Bank S. 0AD. https://collections.library.yale.edu/catalog/2013594.

APA, 6th edition

1. Barn swallow. 2. Female. 3. White-bellied S. 4. Bank S. (0 C.E.). [Illustrations]. https://collections.library.yale.edu/catalog/2013594.