Singapur Curriculum Planning & Development Division. (2021). Social studies (First published.). Star publishing.
Citazione stile Chigago Style (17a edizione)Singapur Curriculum Planning & Development Division. Social Studies. First published. Singapore: Star publishing, 2021.
Citatione MLA (9a ed.)Singapur Curriculum Planning & Development Division. Social Studies. First published. Star publishing, 2021.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.