Cita APA (7a ed.)

Ravalli, R. (2018). Sea otters: A history. University of Nebraska Press.

Cita Chicago Style (17a ed.)

Ravalli, Richard. Sea Otters: A History. Lincoln: University of Nebraska Press, 2018.

Cita MLA (8a ed.)

Ravalli, Richard. Sea Otters: A History. University of Nebraska Press, 2018.