APA (7th ed.) Citation

Leach, D. G. (1961). Rhododendrons of the world and how to grow them. Charles Scribner's Sons.

Chicago Style (17th ed.) Citation

Leach, David G. Rhododendrons of the World and How to Grow Them. New York: Charles Scribner's Sons, 1961.

MLA (9th ed.) Citation

Leach, David G. Rhododendrons of the World and How to Grow Them. Charles Scribner's Sons, 1961.