Lehtonen, R. (2004). Practical methods for design and analysis of complex surveys Risto Lehtonen, Ekki Pahkinnen. John Wiley.
Čikaški stil citiranja (17. izdanje)Lehtonen, Risto. Practical Methods for Design and Analysis of Complex Surveys Risto Lehtonen, Ekki Pahkinnen. John Wiley, 2004.
MLA način citiranja (8. izdanje)Lehtonen, Risto. Practical Methods for Design and Analysis of Complex Surveys Risto Lehtonen, Ekki Pahkinnen. John Wiley, 2004.
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