APA (7th ed.) Citation

Houtman, R. (2004). Variegated trees & shrubs: The illustrated encyclopedia. Timber Press, in association with the Royal Boskoop Horticultural Society.

Chicago Style (17th ed.) Citation

Houtman, Ronald. Variegated Trees & Shrubs: The Illustrated Encyclopedia. Portland, Or.: Timber Press, in association with the Royal Boskoop Horticultural Society, 2004.

MLA (9th ed.) Citation

Houtman, Ronald. Variegated Trees & Shrubs: The Illustrated Encyclopedia. Timber Press, in association with the Royal Boskoop Horticultural Society, 2004.