Gaya APA

Krippendorff, K., Seawell, M, H. (2004). Content Analysis : An Introduction to Its Methodology (Second Edition). California, USA: Sage Publications, Inc..

Gaya MLA

Krippendorff, Klaus., Seawell, Margaret, H.. "Content Analysis : An Introduction to Its Methodology". Second Edition California, USA: Sage Publications, Inc., 2004. Academic.