APA (7th ed.) Citation

Troll, C., Brush, S., & Troll, C. (1987). El eco-sistema andino. Hisbol.

Chicago Style (17th ed.) Citation

Troll, Carl, Stephen Brush, and Carl Troll. El Eco-sistema Andino. La Paz, Bolivia: Hisbol, 1987.

MLA (8th ed.) Citation

Troll, Carl, et al. El Eco-sistema Andino. Hisbol, 1987.

Warning: These citations may not always be 100% accurate.