APA (7th ed.) Citation

Webber, A. L., Hart, C., & Stilgoe, R. (1986). Phantom of the opera. Really Useful Group.

Chicago Style (17th ed.) Citation

Webber, Andrew Lloyd, Charles Hart, and Richard Stilgoe. Phantom of the Opera. [S.l.]: Really Useful Group, 1986.

MLA (9th ed.) Citation

Webber, Andrew Lloyd, et al. Phantom of the Opera. Really Useful Group, 1986.