pandas.merge, pandas development team, 2024 - Official documentation for the pd.merge() function, providing a complete reference for its parameters and merge types.
Python for Data Analysis, Wes McKinney, 2022 (O'Reilly Media) - A foundational book for Pandas data analysis, featuring comprehensive discussions and examples of combining DataFrames with merge operations.
Python Data Science Handbook, Jake VanderPlas, 2016 (O'Reilly Media) - An accessible guide to data science in Python, explaining Pandas data manipulation, including examples of various DataFrame merge types.