APA সাইটেশন

Callenbach, E. (2004). Ecology: A pocket guide. University Press, University of California Press.

শিকাগো স্টাইলে সাইটেশন

Callenbach, Ernest. Ecology: A Pocket Guide. Hyderabad : Berkeley: University Press, University of California Press, 2004.

এমএলএ সাইটেশন

Callenbach, Ernest. Ecology: A Pocket Guide. University Press, University of California Press, 2004.