APA (7th ed.) Citation

ScienceDirect (Online service), Long, B., & Chang, Y. (2014). Relevance ranking for vertical search engines. Elsevier/Morgan Kaufmann.

Chicago Style (17th ed.) Citation

ScienceDirect (Online service), Bo Long, and Yi Chang. Relevance Ranking for Vertical Search Engines. Amsterdam: Elsevier/Morgan Kaufmann, 2014.

MLA (9th ed.) Citation

ScienceDirect (Online service), et al. Relevance Ranking for Vertical Search Engines. Elsevier/Morgan Kaufmann, 2014.