APA (7th ed.) Citation

FOSTER, A. S., & GIFFORD, E. M. (1959). Comparative morphology of vascular plants.-- ed. 2. W.H. Freeman and Co.

Chicago Style (17th ed.) Citation

FOSTER, Adriance S., and Ernest M. GIFFORD. Comparative Morphology of Vascular Plants.-- Ed. 2. San Francisco: W.H. Freeman and Co, 1959.

MLA (9th ed.) Citation

FOSTER, Adriance S., and Ernest M. GIFFORD. Comparative Morphology of Vascular Plants.-- Ed. 2. W.H. Freeman and Co, 1959.