APA (7th ed.) Citation

Gump, H. (2019). Four chords forever (Erstausgabe.). Harry Gump.

Chicago Style (17th ed.) Citation

Gump, Harry. Four Chords Forever. Erstausgabe. [München]: Harry Gump, 2019.

MLA (9th ed.) Citation

Gump, Harry. Four Chords Forever. Erstausgabe. Harry Gump, 2019.

Warning: These citations may not always be 100% accurate.