APA aipamena

Birks, M., & Mills, J. (2015). Grounded theory: A practical guide (2nd ed.). Sage Publications Ltd..

Chicago Style aipamena

Birks, Melanie, and Jane Mills. Grounded Theory: A Practical Guide. 2nd ed. London: Sage Publications Ltd., 2015.

MLA aipamena

Birks, Melanie, and Jane Mills. Grounded Theory: A Practical Guide. 2nd ed. Sage Publications Ltd., 2015.