National Library (Singapore). Young People's Service. (1993). Window to the sky. Young People's Service, National Library, Singapore, Macmillan/McGraw-Hill.
Citação do estilo Chicago (17ª ed.)National Library (Singapore). Young People's Service. Window to the Sky. Singapore : New York: Young People's Service, National Library, Singapore, Macmillan/McGraw-Hill, 1993.
Citação MLA (8ª ed.)National Library (Singapore). Young People's Service. Window to the Sky. Young People's Service, National Library, Singapore, Macmillan/McGraw-Hill, 1993.
Nota: a formatação da citação pode não corresponder 100% ao definido pela respectiva norma.