APA (7th ed.) Citation

Killip, E. P. The American species of Passifloraceae. Field Museum of Natural History.

Chicago Style (17th ed.) Citation

Killip, Ellsworth P. The American Species of Passifloraceae. Chicago: Field Museum of Natural History.

MLA (9th ed.) Citation

Killip, Ellsworth P. The American Species of Passifloraceae. Field Museum of Natural History.

Warning: These citations may not always be 100% accurate.