Cita APA (7a ed.)

Walsh, D., & Keeler, T. (1973). Ibiza. Spectrum group portfolio edition.

Cita Chicago Style (17a ed.)

Walsh, David, y Tony Keeler. Ibiza. [Barcelona: Spectrum group portfolio edition, 1973.

Cita MLA (9a ed.)

Walsh, David, y Tony Keeler. Ibiza. Spectrum group portfolio edition, 1973.