APA (7th ed.) Citation

Smith, T. M., & Smith, R. L. Ecología (6a ed.).

Chicago Style (17th ed.) Citation

Smith, Thomas M., and Robert Leo Smith. Ecología. 6a ed.

MLA (8th ed.) Citation

Smith, Thomas M., and Robert Leo Smith. Ecología. 6a ed.

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