APA (7th ed.) Citation

(2011). Small green roofs: Low-tech options for greener living. Timber Press.

Chicago Style (17th ed.) Citation

Small Green Roofs: Low-tech Options for Greener Living. Portland, Or. [u.a.]: Timber Press, 2011.

MLA (9th ed.) Citation

Small Green Roofs: Low-tech Options for Greener Living. Timber Press, 2011.