APA (7th ed.) Citation

(1999). Extensible Markup Language (XML) 1.0 specifications: From the W3C recommendation. Open Docs Library.

Chicago Style (17th ed.) Citation

Extensible Markup Language (XML) 1.0 Specifications: From the W3C Recommendation. San Jose, CA: Open Docs Library, 1999.

MLA (9th ed.) Citation

Extensible Markup Language (XML) 1.0 Specifications: From the W3C Recommendation. Open Docs Library, 1999.

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