Statistics, D. o. D. a. S. (2019). Introduction to Population Studies II. Obafemi Awolowo University.
Čikaški stil citiranja (17. izdanje)Statistics, Department of Demography and Social. Introduction to Population Studies II. Obafemi Awolowo University, 2019.
MLA način citiranja (9. izdanje)Statistics, Department of Demography and Social. Introduction to Population Studies II. Obafemi Awolowo University, 2019.
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