APA (7th ed.) Citation

Pei, W. C., & Teilhard de Chardin, P. The Fossil Mammals from Locality 13 of Chokoutien.

Chicago Style (17th ed.) Citation

Pei, W. C., and Pierre Teilhard de Chardin. The Fossil Mammals from Locality 13 of Chokoutien.

MLA (9th ed.) Citation

Pei, W. C., and Pierre Teilhard de Chardin. The Fossil Mammals from Locality 13 of Chokoutien.

Warning: These citations may not always be 100% accurate.