<p>1. [MDN Web Docs - HTTP response status codes](https://developer.mozilla.org/en-US/docs/Web/HTTP/Status)</p><p>2. [RFC 7231: Hypertext Transfer Protocol (HTTP/1.1): Semantics and Content](https://tools.ietf.org/html/rfc7231)</p><p>3. [HTTP/1.1: Status Code Definitions - W3.org](https://www.w3.org/Protocols/rfc2616/rfc2616-sec10.html)</p>