APA (7th ed.) Citation

Nold, R. (2003). Columbines: Aquilegia, paraquilegia, and semiaquilegia. Timber Press.

Chicago Style (17th ed.) Citation

Nold, Robert. Columbines: Aquilegia, Paraquilegia, and Semiaquilegia. Portland, Or.: Timber Press, 2003.

MLA (9th ed.) Citation

Nold, Robert. Columbines: Aquilegia, Paraquilegia, and Semiaquilegia. Timber Press, 2003.

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