I speak BASIC to my Commodore 64: Teacher's manual: Jones, Aubrey B: 9780810461628: Amazon.com: Books
Amazon.com: Start Here: The Fundamentals of Commodore 64 Programming in BASIC and 6502 Assembly Language: For real or emulated C64s eBook : McGinnis, John: Kindle Store
THEC64 MicroComputer User Manual: Retro Games Ltd.: 9781789822144: Amazon.com: Books