Cita APA (7a ed.)

Mansilla, H., de Valais, S., Stinnesbeck, W., Varela, N., & Leppe, M. New Avian tracks from the lower to middle Eocene at Fossil Hill, King George Island, Antarctica. Cambridge University Press.

Cita Chicago Style (17a ed.)

Mansilla, Héctor, Silvina de Valais, Wolfgang Stinnesbeck, Natalia Varela, y Marcelo Leppe. New Avian Tracks from the Lower to Middle Eocene at Fossil Hill, King George Island, Antarctica. Cambridge University Press.

Cita MLA (8a ed.)

Mansilla, Héctor, et al. New Avian Tracks from the Lower to Middle Eocene at Fossil Hill, King George Island, Antarctica. Cambridge University Press.