APA (7th ed.) Citation

Bernstein, L., Lindberg, C., & Pöntinen, R. Elegy for Mippy II.

Chicago Style (17th ed.) Citation

Bernstein, Leonard, Christian Lindberg, and Roland Pöntinen. Elegy for Mippy II.

MLA (9th ed.) Citation

Bernstein, Leonard, et al. Elegy for Mippy II.