Citazione Stile APA (7a Edizione)

Fuentetaja, J., & Perales, A. (2006). New science: Science, geography and history; [the learning ladder]. Santillana.

Citazione stile Chigago Style (17a edizione)

Fuentetaja, Jesús, e Antonia Perales. New Science: Science, Geography and History; [the Learning Ladder]. Madrid [u.a.]: Santillana, 2006.

Citatione MLA (9a ed.)

Fuentetaja, Jesús, e Antonia Perales. New Science: Science, Geography and History; [the Learning Ladder]. Santillana, 2006.