Cita APA (7th ed.)
Carlson, D. (2007). Roger Tory Peterson: A biography. University of Texas Press.
Cita Chicago (17th ed.)
Carlson, Douglas. Roger Tory Peterson: A Biography. Austin: University of Texas Press, 2007.
Cita MLA (9th ed.)
Carlson, Douglas. Roger Tory Peterson: A Biography. University of Texas Press, 2007.
Atenció: Aquestes cites poden no estar 100% correctes.