Cita APA (7a ed.)

Krippendorff, K. (2004). Content analysis: An introduction to its methodology (2nd ed.). Sage.

Cita Chicago Style (17a ed.)

Krippendorff, Klaus. Content Analysis: An Introduction to Its Methodology. 2nd ed. Thousand Oaks: Sage, 2004.

Cita MLA (9a ed.)

Krippendorff, Klaus. Content Analysis: An Introduction to Its Methodology. 2nd ed. Sage, 2004.