docs: fix: Fix unpopulated References section in the README

Signed-off-by: 林博仁(Buo-ren, Lin) <Buo.Ren.Lin@gmail.com>

Author: brlin-tw

README.md

@@ -5,9 +5,16 @@ Ready-to-use bash shell script templates at your fingertips!
 <https://gitlab.com/the-common/bash-script-templates>  
 [![The GitLab CI pipeline status badge of the project's `main` branch](https://gitlab.com/the-common/bash-script-templates/badges/main/pipeline.svg?ignore_skipped=true "Click here to check out the comprehensive status of the GitLab CI pipelines")](https://gitlab.com/the-common/bash-script-templates/-/pipelines) [![GitHub Actions workflow status badge](https://github.com/the-common/bash-script-templates/actions/workflows/check-potential-problems.yml/badge.svg "GitHub Actions workflow status")](https://github.com/the-common/bash-script-templates/actions/workflows/check-potential-problems.yml) [![pre-commit enabled badge](https://img.shields.io/badge/pre--commit-enabled-brightgreen?logo=pre-commit&logoColor=white "This project uses pre-commit to check potential problems")](https://pre-commit.com/) [![REUSE Specification compliance badge](https://api.reuse.software/badge/gitlab.com/the-common/bash-script-templates "This project complies to the REUSE specification to decrease software licensing costs")](https://api.reuse.software/info/gitlab.com/the-common/bash-script-templates)
 
-## Reference
+## References
 
-To be addressed.
+* [The Common / The Common GNU Bash Shell Script Templates · GitLab](https://gitlab.com/the-common/bash-script-templates)  
+  The project's main site
+* [Issues · The Common / The Common GNU Bash Shell Script Templates · GitLab](https://gitlab.com/the-common/bash-script-templates/-/issues)  
+  The project's issue tracker
+* [the-common/bash-script-templates: (MIRRORED FROM GITLAB) Ready-to-use bash shell script templates at your fingertips!](https://github.com/the-common/bash-script-templates)  
+  The GitHub Git repository mirror project
+* [GNU Bash manual - GNU Project - Free Software Foundation](https://www.gnu.org/software/bash/manual/)  
+  For references of the language and syntax used in the Bash scripts
 
 ## Licensing