APA (7th ed.) Citation

Zhu, D., Dreher, H., & Tang, C. (2008). Improving web search by categorization, clustering, and personalization. Springer.

Chicago Style (17th ed.) Citation

Zhu, Dengya, Heinz Dreher, and CH Tang. Improving Web Search by Categorization, Clustering, and Personalization. Springer, 2008.

MLA (9th ed.) Citation

Zhu, Dengya, et al. Improving Web Search by Categorization, Clustering, and Personalization. Springer, 2008.