Relevance Ranking for Vertical Search Engines
  MLA
  Bo Long, Yi Chang, and Bo Long. Relevance Ranking for Vertical Search Engines. Morgan Kaufmann, 2014.
  APA
  Bo Long, B. Long, Chang, Y., & Long, B. (2014). Relevance Ranking for Vertical Search Engines. Morgan Kaufmann.
  Chicago
  Bo Long, Yi Chang, and Bo Long. Relevance Ranking for Vertical Search Engines. : Morgan Kaufmann, 2014.