Cita APA (7th ed.)

Ortega, J. L. (2014). Academic search engines: A quantitative outlook. Elsevier.

Cita Chicago (17th ed.)

Ortega, Jose Luis. Academic Search Engines: A Quantitative Outlook. Amsterdam: Elsevier, 2014.

Cita MLA (9th ed.)

Ortega, Jose Luis. Academic Search Engines: A Quantitative Outlook. Elsevier, 2014.