Berg, B. L. [ca. 2009]. Qualitative research methods for the social sciences. In Pearson international edition (7. ed.) [Book]. Boston [u.a.]: Allyn & Bacon.

BERG, Bruce L., 2009. Qualitative research methods for the social sciences. 7. ed. Boston [u.a.]: Allyn & Bacon. ISBN 9780205668106.

Berg, B. L. „Qualitative research methods for the social sciences“. Pearson international edition, 7. ed., book, Allyn & Bacon, 2009.

Berg, Bruce L.: Qualitative research methods for the social sciences, 7. ed. Aufl. Boston [u.a.] 2009.

Berg, B.L. (2009), Qualitative research methods for the social sciences, Pearson international edition, 7. ed., Bd. , Allyn & Bacon, Boston [u.a.].