Gibbs. (2009). Analysing Qualitative Data (1st.ed.).
Chicago Style aipamenaGibbs. Analysing Qualitative Data. 1st.ed. London, 2009.
MLA aipamenaGibbs. Analysing Qualitative Data. 1st.ed. 2009.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.