Cita APA (7a ed.)
Carlson, D. (2007). Roger Tory Peterson: A biography. University of Texas Press.
Cita Chicago Style (17a ed.)
Carlson, Douglas. Roger Tory Peterson: A Biography. Austin: University of Texas Press, 2007.
Cita MLA (9a ed.)
Carlson, Douglas. Roger Tory Peterson: A Biography. University of Texas Press, 2007.
Precaución: Estas citas no son 100% exactas.