APA (7th ed.) Citation

Beck , J., Gwerder , U., & Cookson , H. (1969). [Twenty-one] 21 songs of the Revolution. Hotcha, April Verlag.

Chicago Style (17th ed.) Citation

Beck , Julian, Urban Gwerder , and Henry Cookson. [Twenty-one] 21 Songs of the Revolution. Hotcha, April Verlag, 1969.

MLA (8th ed.) Citation

Beck , Julian, et al. [Twenty-one] 21 Songs of the Revolution. Hotcha, April Verlag, 1969.