Yee, S. O. (2000). Earth: our home: A secondary geography course ([Lower secondary course].). MPH Education.
Citazione stile Chigago Style (17a edizione)Yee, Sze Onn. Earth: Our Home: A Secondary Geography Course. [Lower secondary course]. Singapore: MPH Education, 2000.
Citatione MLA (9a ed.)Yee, Sze Onn. Earth: Our Home: A Secondary Geography Course. [Lower secondary course]. MPH Education, 2000.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.