Indexing and selecting data, The pandas development team, 2024 - The official user guide for Pandas data selection, explaining the .loc accessor and its various uses for label-based indexing and data retrieval.
Python for Data Analysis, Wes McKinney, 2022 (O'Reilly Media) - A comprehensive book on Python for data analysis, authored by the creator of Pandas, providing a detailed explanation of Pandas DataFrames, including label-based indexing with .loc.