APA (7th ed.) Citation

Xu, C. (2017). Darriwilian to Katian (Ordovician) Graptolites from Northwest China. Elsevier.

Chicago Style (17th ed.) Citation

Xu, Cheng. Darriwilian to Katian (Ordovician) Graptolites from Northwest China. Amsterdam: Elsevier, 2017.

MLA (9th ed.) Citation

Xu, Cheng. Darriwilian to Katian (Ordovician) Graptolites from Northwest China. Elsevier, 2017.

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