APA (7th ed.) Citation

Harkness, P. (1992). Roses to enjoy. The Royal National Rose Society.

Chicago Style (17th ed.) Citation

Harkness, Peter. Roses to Enjoy. Albany: The Royal National Rose Society, 1992.

MLA (9th ed.) Citation

Harkness, Peter. Roses to Enjoy. The Royal National Rose Society, 1992.