Cita APA (7th ed.)

Francis, M., & Knight, C. (1987). Cumulus. Parkett.

Cita Chicago (17th ed.)

Francis, Mark, i Christopher Knight. "Cumulus." Parkett 1987.

Cita MLA (8th ed.)

Francis, Mark, i Christopher Knight. "Cumulus." Parkett, 1987.

Atenció: Aquestes cites poden no estar 100% correctes.