National Book Development Council of Singapore. (1981). First national readership survey. National Book Development Council of Singapore.
Lua i Stíl Chicago (17ú heag.)National Book Development Council of Singapore. First National Readership Survey. [Singapore]: National Book Development Council of Singapore, 1981.
Lua MLA (8ú heag.)National Book Development Council of Singapore. First National Readership Survey. National Book Development Council of Singapore, 1981.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.