Update README.md

Author: HzaCode

README.md

@@ -5,6 +5,7 @@
 
 [![Total Downloads](https://img.shields.io/pepy/dt/cheminformant?style=flat-square&color=306998&label=Downloads&logo=python)](https://pepy.tech/project/cheminformant)
 [![Codacy Badge](https://app.codacy.com/project/badge/Grade/ba35e3e2f5224858bcaeb8f9c4ee2838)](https://app.codacy.com/gh/HzaCode/ChemInformant/dashboard?utm_source=gh&utm_medium=referral&utm_content=&utm_campaign=Badge_grade)
+[![Citation](https://img.shields.io/badge/Citation-blue?style=flat-square&logo=github&logoColor=white)](#citation)
 
 <a href="https://joss.theoj.org/papers/b263ab8f865610c7c7a7f981035f78f7"><img src="https://joss.theoj.org/papers/b263ab8f865610c7c7a7f981035f78f7/status.svg"></a>
 [![PyPI version](https://img.shields.io/pypi/v/ChemInformant.svg)](https://pypi.org/project/ChemInformant/)
@@ -15,6 +16,8 @@
 [![PyPI - License](https://img.shields.io/pypi/l/ChemInformant.svg)](https://github.com/HzaCode/ChemInformant/blob/main/LICENSE.md)
 [![Docs](https://img.shields.io/badge/Docs-Read_Online-blue?style=flat-square&logo=book&logoColor=white)](https://hezhiang.com/ChemInformant)
 [![DOI](https://zenodo.org/badge/DOI/10.5281/zenodo.16623785.svg)](https://doi.org/10.5281/zenodo.16623785)
+[![Citation](https://img.shields.io/badge/citation-BibTeX-blue?logo=tex&logoColor=white)](https://doi.org/10.5281/zenodo.16623785)
+