National Book Development Council of Singapore. (1981). First national readership survey. National Book Development Council of Singapore.
Chicago-Zitierstil (17. Ausg.)National Book Development Council of Singapore. First National Readership Survey. [Singapore]: National Book Development Council of Singapore, 1981.
MLA-Zitierstil (8. Ausg.)National Book Development Council of Singapore. First National Readership Survey. National Book Development Council of Singapore, 1981.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.