APA (7th ed.) Citation

Gelderen, D. v., & Hoey Smith, J. v. (1996). Conifers: The illustrated encyclopedia. Royal Boskoop Horticultural Society.

Chicago Style (17th ed.) Citation

Gelderen, D.M. van, and J.R.P. van Hoey Smith. Conifers: The Illustrated Encyclopedia. Portland: Royal Boskoop Horticultural Society, 1996.

MLA (9th ed.) Citation

Gelderen, D.M. van, and J.R.P. van Hoey Smith. Conifers: The Illustrated Encyclopedia. Royal Boskoop Horticultural Society, 1996.