De Haan, D. B. (1958). Guiding principles of activity, based on the application of scientific method: What sociologists should know for the radical improvement of the life of man. Brill.
Chicago Style (17th ed.) CitationDe Haan, D. Bierens. Guiding Principles of Activity, Based on the Application of Scientific Method: What Sociologists Should Know for the Radical Improvement of the Life of Man. Leiden: Brill, 1958.
MLA (9th ed.) CitationDe Haan, D. Bierens. Guiding Principles of Activity, Based on the Application of Scientific Method: What Sociologists Should Know for the Radical Improvement of the Life of Man. Brill, 1958.
Warning: These citations may not always be 100% accurate.