So sánh phương pháp

	Thu thập tài liệu đa nguồn	Bộ sưu tập tài liệu tam giác hóa
Lĩnh vực	Phương pháp luận khảo sát	Phương pháp luận khảo sát
Họ	Process / pipeline	Process / pipeline
Năm ra đời	1970s–2000s (systematic articulation)	1978 (triangulation); 2009 (document analysis as method)
Người khởi xướng	Rooted in qualitative documentary traditions; codified in mixed-methods and triangulation literature (Denzin 1970s; Bowen 2009)	Norman K. Denzin (triangulation principle); Glenn Bowen (document analysis formalization)
Loại	Data collection strategy	Qualitative/mixed-methods data collection strategy
Công trình gốc	Bowen, G. A. (2009). Document analysis as a qualitative research method. Qualitative Research Journal, 9(2), 27–40.	Denzin, N. K. (1978). The Research Act: A Theoretical Introduction to Sociological Methods (2nd ed.). McGraw-Hill.
Tên gọi khác	multi-source documentary research, multiple-document data collection, multi-site document analysis, cross-source document gathering	documentary triangulation, multi-source document collection, cross-source document analysis, data triangulation via documents
Liên quan	3	4
Tóm tắt	Multi-source document collection is a data-gathering strategy in which researchers systematically locate, retrieve, and compare documents drawn from two or more independent sources — such as government archives, institutional records, media outlets, organisational reports, or digital repositories. By assembling evidence from diverse provenance, researchers can triangulate findings, detect discrepancies, and build a richer, more credible picture of the phenomenon under study than any single documentary source can provide.	Triangulated document collection is a qualitative data collection strategy in which documents from multiple independent sources are gathered and cross-checked against one another. By drawing on different document types — such as official records, personal archives, institutional reports, and media artifacts — the researcher reduces reliance on any single source and strengthens the credibility of the evidence base. The approach applies Denzin's data triangulation principle directly to documentary material.