Cita APA (7th ed.)

Cossio, A., & Erre, M. (2016). Skating for the sky. [publisher not identified].

Cita Chicago (17th ed.)

Cossio, Alexander, i Milton Erre. Skating for the Sky. Medellín, Colombia: [publisher not identified], 2016.

Cita MLA (9th ed.)

Cossio, Alexander, i Milton Erre. Skating for the Sky. [publisher not identified], 2016.