Cita APA (7a ed.)

Tanner, O., & Graves, E. (1977). Beavers and Other Pond Dwellers: Wild, Wild World of Animals. Time - Life Films.

Cita Chicago Style (17a ed.)

Tanner, Ogden, y Eleanor Graves. Beavers and Other Pond Dwellers: Wild, Wild World of Animals. [New York]: Time - Life Films, 1977.

Cita MLA (9a ed.)

Tanner, Ogden, y Eleanor Graves. Beavers and Other Pond Dwellers: Wild, Wild World of Animals. Time - Life Films, 1977.