APA (7th ed.) Citation

Krippendorff, K. (1980). Content analysis: An introduction to its methodology. Sage.

Chicago Style (17th ed.) Citation

Krippendorff, Klaus. Content Analysis: An Introduction to Its Methodology. Beverly Hills [etc.]: Sage, 1980.

MLA (9th ed.) Citation

Krippendorff, Klaus. Content Analysis: An Introduction to Its Methodology. Sage, 1980.