Fernández Martínez, V. (2006). Essential Science: 3 : science, geography and history. Richmond : Santillana.
Citazione stile Chigago Style (17a edizione)Fernández Martínez, Victoria. Essential Science: 3 : Science, Geography and History. Madrid: Richmond : Santillana, 2006.
Citatione MLA (9a ed.)Fernández Martínez, Victoria. Essential Science: 3 : Science, Geography and History. Richmond : Santillana, 2006.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.