एपीए उद्धरण

Vega, O. A., & Vinasco-Salazar, R. E. (2014). CAPTCHA: A solution for computer security or a problem to access/ use the web?

शिकागो स्टाइल उद्धरण

Vega, Omar Antonio, और Ronald Eduardo Vinasco-Salazar. CAPTCHA: A Solution for Computer Security or a Problem to Access/ Use the Web? 2014.

एमएलए उद्धरण

Vega, Omar Antonio, और Ronald Eduardo Vinasco-Salazar. CAPTCHA: A Solution for Computer Security or a Problem to Access/ Use the Web? 2014.