APA (7th ed.) Citation

Polunin, O., & Everard, B. (1969). Flowers of Europe: A field guide. Oxford University Press.

Chicago Style (17th ed.) Citation

Polunin, Oleg, and Barbara Everard. Flowers of Europe: A Field Guide. London [et al.]: Oxford University Press, 1969.

MLA (9th ed.) Citation

Polunin, Oleg, and Barbara Everard. Flowers of Europe: A Field Guide. Oxford University Press, 1969.