Cita APA (7th ed.)

Martin Esteban & Carranza, A. (2008). The gaudi key: Unlock the secret of the century (First edition.). HarperCollins.

Cita Chicago (17th ed.)

Martin Esteban i Andreu Carranza. The Gaudi Key: Unlock the Secret of the Century. First edition. London: HarperCollins, 2008.

Cita MLA (9th ed.)

Martin Esteban i Andreu Carranza. The Gaudi Key: Unlock the Secret of the Century. First edition. HarperCollins, 2008.