Languages and Genes in Northwestern China and Adjacent Regions
  MLA
  Xu, Dan, and Hui Li. Languages and Genes In Northwestern China and Adjacent Regions. Singapore: Springer Singapore, 2017.
  APA
  Xu, D., & Li, H. (2017). Languages and Genes in Northwestern China and Adjacent Regions. Singapore: Springer Singapore.
  Chicago
  Xu, Dan, and Hui Li. Languages and Genes In Northwestern China and Adjacent Regions. Singapore: Springer Singapore, 2017.