Cita APA (7a ed.)

Simpson, G. 1. (1972). Didelphidae from the chapadmalal formation in the Museo municipal de ciencias naturales of Mar del Plata.

Cita Chicago Style (17a ed.)

Simpson, George 1902. Didelphidae from the Chapadmalal Formation in the Museo Municipal De Ciencias Naturales of Mar Del Plata. Mar del Plata, 1972.

Cita MLA (9a ed.)

Simpson, George 1902. Didelphidae from the Chapadmalal Formation in the Museo Municipal De Ciencias Naturales of Mar Del Plata. 1972.