Amazon.co.jp: 4-Chord Worship Songs for Guitar: Play 25 Worship Songs with Four Chords: G-C-D-Em (GUITARE) (English Edition) 電子書籍: Hal Leonard Corp.: 洋書
Top 5 Songs Made with Sad Chords | Beginner Guitar HQ
105 One chord songs that any beginner can play | Music Times
WATCH: Ed Sheeran Proves You Can Sing Every Pop Song Using The Same Four Chords - Capital