APA (7th ed.) Citation

(1969). Rhododendron handbook 1969 (New edition.). Rhododendron Group, The Royal Horticultural Society.

Chicago Style (17th ed.) Citation

Rhododendron Handbook 1969. New edition. London: Rhododendron Group, The Royal Horticultural Society, 1969.

MLA (9th ed.) Citation

Rhododendron Handbook 1969. New edition. Rhododendron Group, The Royal Horticultural Society, 1969.

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