Cita APA (7th ed.)

Krippendorff, K. (2013). Content analysis: An introduction to its methodology (3a. ed.). SAGE.

Cita Chicago (17th ed.)

Krippendorff, Klaus. Content Analysis: An Introduction to Its Methodology. 3a. ed. Los Angeles: SAGE, 2013.

Cita MLA (9th ed.)

Krippendorff, Klaus. Content Analysis: An Introduction to Its Methodology. 3a. ed. SAGE, 2013.