Organ, M. (2016). Earth: Leaving certificate geography, higher and ordinary levels. Educate.ie.
Citazione stile Chigago Style (17a edizione)Organ, Michael. Earth: Leaving Certificate Geography, Higher and Ordinary Levels. Dublin: Educate.ie, 2016.
Citatione MLA (9a ed.)Organ, Michael. Earth: Leaving Certificate Geography, Higher and Ordinary Levels. Educate.ie, 2016.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.