Singapur Curriculum Planning & Development Division. (2024). Geography: Upper secondary geography textbook (Express / Normal (Academic), First published.). Ministry of Education, Government of Singapore.
Citazione stile Chigago Style (17a edizione)Singapur Curriculum Planning & Development Division. Geography: Upper Secondary Geography Textbook. Express / Normal (Academic), First published. Singapore: Ministry of Education, Government of Singapore, 2024.
Citatione MLA (9a ed.)Singapur Curriculum Planning & Development Division. Geography: Upper Secondary Geography Textbook. Express / Normal (Academic), First published. Ministry of Education, Government of Singapore, 2024.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.