Cita APA (7a ed.)

(1998). Pipid frogs from the upper cretaceous of in beceten, niger.

Cita Chicago Style (17a ed.)

Pipid Frogs from the Upper Cretaceous of in Beceten, Niger. 1998.

Cita MLA (8a ed.)

Pipid Frogs from the Upper Cretaceous of in Beceten, Niger. 1998.