Bryman, A. (1988). Quantity and quality in social research. Unwin Hyman.
Lua i Stíl Chicago (17ú heag.)Bryman, Alan. Quantity and Quality in Social Research. London: Unwin Hyman, 1988.
Lua MLA (9ú heag.)Bryman, Alan. Quantity and Quality in Social Research. Unwin Hyman, 1988.
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