APA-referens

Croft, B. W., Metzler, D., & Strohman, T. (2010). Search engines: Information retrieval in practice. Pearson education.

Chicago-stil citat

Croft, Bruce W., Donald Metzler, och Trevor Strohman. Search Engines: Information Retrieval in Practice. Boston: Pearson education, 2010.

MLA-referens

Croft, Bruce W., et al. Search Engines: Information Retrieval in Practice. Pearson education, 2010.