Commodore 64 BASIC Programming Course - RetroGameCoders
QBasic Tutorial for Beginners - qbasic.net
QBASIC Programming Tutorial - petesqbsite.com
QBASIC Programming for Kids - tedfelix.com
Learn Commodore 64 BASIC Programming - RetroGameStart.com
Learn Basic Programming In 14 Days On Your Commodore 64
Computer Programming in BASIC for Everone 1973, Houghton Miflin

Basic Language Interpreter, Weaver
Fun And Games With The Computer
Advanced Basic, Applications and problems