Cita APA (7th ed.)
Dingus, L., & Norell, M. (2010). Barnum Brown: The man who discovered Tyrannosaurus rex. University of California Press.
Cita Chicago (17th ed.)
Dingus, Lowell, i Mark Norell. Barnum Brown: The Man Who Discovered Tyrannosaurus Rex. Berkeley: University of California Press, 2010.
Cita MLA (9th ed.)
Dingus, Lowell, i Mark Norell. Barnum Brown: The Man Who Discovered Tyrannosaurus Rex. University of California Press, 2010.
Atenció: Aquestes cites poden no estar 100% correctes.