National Book Development Council of Singapore. (1981). First national readership survey. National Book Development Council of Singapore.
Čikaški stil citiranja (17. izdanje)National Book Development Council of Singapore. First National Readership Survey. [Singapore]: National Book Development Council of Singapore, 1981.
MLA način citiranja (8. izdanje)National Book Development Council of Singapore. First National Readership Survey. National Book Development Council of Singapore, 1981.
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