APA (7th ed.) Citation

Dirr, M. (2007). Viburnums: Flowering shrubs for every season. Timber Press.

Chicago Style (17th ed.) Citation

Dirr, Michael. Viburnums: Flowering Shrubs for Every Season. Portland, Or.: Timber Press, 2007.

MLA (8th ed.) Citation

Dirr, Michael. Viburnums: Flowering Shrubs for Every Season. Timber Press, 2007.

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