Lua APA (7ú heag.)
Vogt, W. P. (2013). Sage quantitative research methods: Fundamental issues in qualitative research. Sage.
Lua i Stíl Chicago (17ú heag.)
Vogt, W. Paul. Sage Quantitative Research Methods: Fundamental Issues in Qualitative Research. Los Angeles: Sage, 2013.
Lua MLA (9ú heag.)
Vogt, W. Paul. Sage Quantitative Research Methods: Fundamental Issues in Qualitative Research. Sage, 2013.
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