Conifers : the illustrated encyclopedia

MLA

Van Gelderen, D. M, and J. R. P Van Hoey Smith. Conifers : the Illustrated Encyclopedia. Portland, Or.: Timber press, 1996.

APA

Van Gelderen, D. M, & Van Hoey Smith, J. R. P. (1996). Conifers : the illustrated encyclopedia. Portland, Or.: Timber press.

Chicago

Van Gelderen, D. M., and J. R. P Van Hoey Smith. Conifers: The Illustrated Encyclopedia. Portland, Or.: Timber press, 1996.