Cita APA (7th ed.)
Erickson, L., & Bowen, B. (2011). Twelve owls. University of Minnesota Press.
Cita Chicago (17th ed.)
Erickson, Laura, i Betsy Bowen. Twelve Owls. Minneapolis: University of Minnesota Press, 2011.
Cita MLA (9th ed.)
Erickson, Laura, i Betsy Bowen. Twelve Owls. University of Minnesota Press, 2011.
Atenció: Aquestes cites poden no estar 100% correctes.