diff --git a/CITATION.cff b/CITATION.cff
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--- /dev/null
+++ b/CITATION.cff
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+title: RRLeo-Photometry
+authors:
+  - given-names: HY. Kelvin
+    family-names: Lee
+cff-version: 1.2.0
+message: If you use this software, please cite it using the metadata from this file.
+type: software
+doi: 10.5281/zenodo.8190781
+abstract: The Periodic Magnitude of variable star RR Leo
+keywords:
+  - Variable Star
+  - Astronomy
+license: MIT
+repository-code: https://github.com/hykelvinlee42/RRLeo-Photometry
diff --git a/codemeta.json b/codemeta.json
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+{
+  "name": "RRLeo-Photometry",
+  "@context": "https://w3id.org/codemeta/3.0",
+  "author": [
+    {
+      "familyName": "Lee",
+      "id": "https://orcid.org/0009-0000-7340-3204",
+      "givenName": "HY. Kelvin",
+      "type": "Person"
+    }
+  ],
+  "codeRepository": "https://github.com/hykelvinlee42/RRLeo-Photometry",
+  "dateCreated": "2021-04-08",
+  "description": "The Periodic Magnitude of variable star RR Leo",
+  "identifier": "10.5281/zenodo.8190781",
+  "issueTracker": "https://github.com/hykelvinlee42/RRLeo-Photometry/issues",
+  "keywords": [
+    "Variable Star",
+    "Astronomy"
+  ],
+  "license": "https://spdx.org/licenses/MIT",
+  "programmingLanguage": [
+    "Python"
+  ],
+  "type": "SoftwareSourceCode"
+}
\ No newline at end of file