APA (7th ed.) Citation

Martin & Easton. (1957). Campanula rotundifolia L. The Keep.

Chicago Style (17th ed.) Citation

Martin and Easton. Campanula Rotundifolia L. The Keep, 1957.

MLA (9th ed.) Citation

Martin and Easton. Campanula Rotundifolia L. The Keep, 1957.

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