Japan sewers clean up their act with manhole art. IN World News. Manila Bulletin.
Citazione stile Chigago Style (17a edizione)"Japan Sewers Clean Up Their Act with Manhole Art. IN World News." Manila Bulletin .
Citatione MLA (9a ed.)"Japan Sewers Clean Up Their Act with Manhole Art. IN World News." Manila Bulletin, .
Attenzione: Queste citazioni potrebbero non essere precise al 100%.