APA引文

Johnsgard, P. A. (2011). Sandhill and whooping cranes: Ancient voices over America's wetlands. University of Nebraska Press.

Chicago Style (17th ed.) Citation

Johnsgard, Paul A. Sandhill and Whooping Cranes: Ancient Voices over America's Wetlands. Lincoln [Neb.]: University of Nebraska Press, 2011.

MLA引文

Johnsgard, Paul A. Sandhill and Whooping Cranes: Ancient Voices over America's Wetlands. University of Nebraska Press, 2011.