APA Citation

López Herrera, G., Quesada Quirós, L., & Guerrero Blanco, L. A. (2017). Alexa vs. Siri vs. Cortana vs. Google Assistant: A Comparison of Speech-Based Natural User Interfaces.

Chicago Style Citation

López Herrera, Gustavo, Luis Quesada Quirós, and Luis Alberto Guerrero Blanco. Alexa Vs. Siri Vs. Cortana Vs. Google Assistant: A Comparison of Speech-Based Natural User Interfaces. 2017.

MLA Citation

López Herrera, Gustavo, Luis Quesada Quirós, and Luis Alberto Guerrero Blanco. Alexa Vs. Siri Vs. Cortana Vs. Google Assistant: A Comparison of Speech-Based Natural User Interfaces. 2017.

Warning: These citations may not always be 100% accurate.