Set Types - set, frozenset, Python Software Foundation, 2023 - Official documentation for Python's built-in set data structure, detailing its operations and methods.
Learning Python, Mark Lutz, 2013 (O'Reilly Media) - A comprehensive guide covering Python's core data types, including sets and their operations, suitable for understanding language fundamentals.
Discrete Mathematics and Its Applications, Kenneth H. Rosen, 2018 (McGraw-Hill Education) - A standard textbook providing foundational knowledge of mathematical set theory, which forms the basis for Python's set operations.