National Book Development Council of Singapore. (1981). First national readership survey. National Book Development Council of Singapore.
Citação do estilo Chicago (17ª ed.)National Book Development Council of Singapore. First National Readership Survey. [Singapore]: National Book Development Council of Singapore, 1981.
Citação MLA (8ª ed.)National Book Development Council of Singapore. First National Readership Survey. National Book Development Council of Singapore, 1981.
Nota: a formatação da citação pode não corresponder 100% ao definido pela respectiva norma.