Cita APA (7th ed.)
Johnsgard, P. A. (2011). Sandhill and whooping cranes: Ancient voices over America's wetlands. University of Nebraska Press.
Cita Chicago (17th ed.)
Johnsgard, Paul A. Sandhill and Whooping Cranes: Ancient Voices over America's Wetlands. Lincoln [Neb.]: University of Nebraska Press, 2011.
Cita MLA (9th ed.)
Johnsgard, Paul A. Sandhill and Whooping Cranes: Ancient Voices over America's Wetlands. University of Nebraska Press, 2011.
Atenció: Aquestes cites poden no estar 100% correctes.