APA (7th ed.) Citation

(2004). Echinacea: The genus Echinacea. CRC Press.

Chicago Style (17th ed.) Citation

Echinacea: The Genus Echinacea. Boca Raton [u.a.]: CRC Press, 2004.

MLA (9th ed.) Citation

Echinacea: The Genus Echinacea. CRC Press, 2004.

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