APA (7th ed.) Citation
Putz, F., & Viana, V. (1996). Biological challenges for certification of tropical timber.
Chicago Style (17th ed.) Citation
Putz, F.E, and V. Viana. Biological Challenges for Certification of Tropical Timber. 1996.
MLA (9th ed.) Citation
Putz, F.E, and V. Viana. Biological Challenges for Certification of Tropical Timber. 1996.
Warning: These citations may not always be 100% accurate.