APA način citiranja (7. izdanje)

CALLENBACH; ERNEST. (2004). ECOLOGY - A POCKET GUIDE (REPRINT.). UNIVERSITIES PRESS.

Čikaški stil citiranja (17. izdanje)

CALLENBACH; ERNEST. ECOLOGY - A POCKET GUIDE. REPRINT. HYDERABAD: UNIVERSITIES PRESS, 2004.

MLA način citiranja (9. izdanje)

CALLENBACH; ERNEST. ECOLOGY - A POCKET GUIDE. REPRINT. UNIVERSITIES PRESS, 2004.