APA (7e ed.) Bronvermelding

(1917). The Original Guckert's chords for the ukulele at sight: Without notes or teacher. Union Music.

Chicago (17e ed.) Bronvermelding

The Original Guckert's Chords for the Ukulele at Sight: Without Notes or Teacher. Toledo: Union Music, 1917.

MLA (9e ed.) Bronvermelding

The Original Guckert's Chords for the Ukulele at Sight: Without Notes or Teacher. Union Music, 1917.