APA (7th ed.) Citation

Sheeran, E. (2013). + [Plus sign]: [piano, vocal, guitar]. Hal Leonard Corporation.

Chicago Style (17th ed.) Citation

Sheeran, Ed. + [Plus Sign]: [piano, Vocal, Guitar]. Milwaukee, WI: Hal Leonard Corporation, 2013.

MLA (9th ed.) Citation

Sheeran, Ed. + [Plus Sign]: [piano, Vocal, Guitar]. Hal Leonard Corporation, 2013.

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