You might be looking for:

• Wikivoyage:External links - Guidelines on linking to external sites.
• Wikivoyage:Internal links - Guidelines on linking from one Wikivoyage article to another.
• Wikivoyage:Wiki markup#Making links - Instructions for creating links using wiki syntax.
• Wikivoyage:Links to Wikipedia - Guidelines on linking to Wikipedia.
• Wikivoyage:Links from Wikipedia - How to add links from Wikipedia to Wikivoyage.
• Wikivoyage:Sister project links - Guidelines for linking to sister projects like Wikinews or Wiktionary.
• Wikivoyage:Inter-language links - Guidelines on linking to other language versions of Wikivoyage.
• Wikivoyage:Cooperating with Wikidata - Guidelines for adding interwiki links via Wikidata.