APA (7th ed.) Citation

Krippendorff, K. (2009). Content analysis: An introduction to its methodology (2nd ed.). Sage.

Chicago Style (17th ed.) Citation

Krippendorff, Klaus. Content Analysis: An Introduction to Its Methodology. 2nd ed. Thousand Oaks, California: Sage, 2009.

MLA (9th ed.) Citation

Krippendorff, Klaus. Content Analysis: An Introduction to Its Methodology. 2nd ed. Sage, 2009.