Cita APA (7th ed.)
Holsti, O. R. Content Analysis for the Social Sciences and Humanities. Addison-Wesley.
Cita Chicago (17th ed.)
Holsti, Ole R. Content Analysis for the Social Sciences and Humanities. Boston, EUA: Addison-Wesley.
Cita MLA (9th ed.)
Holsti, Ole R. Content Analysis for the Social Sciences and Humanities. Addison-Wesley.
Atenció: Aquestes cites poden no estar 100% correctes.