Pratt, B., & Loizos, P. (1992). Choosing research methods: Data collection for development workers. Oxfam.
Lua i Stíl Chicago (17ú heag.)Pratt, Brian, agus Peter Loizos. Choosing Research Methods: Data Collection for Development Workers. Oxford: Oxfam, 1992.
Lua MLA (8ú heag.)Pratt, Brian, agus Peter Loizos. Choosing Research Methods: Data Collection for Development Workers. Oxfam, 1992.
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