Young, P., & Schmid, C. F. (1949). Scientific social survey and research: An introduction to the background, content, methods and analysis of social studies. Prentice-Hall.
Lua i Stíl Chicago (17ú heag.)Young, Pauline, agus Calvin Fisher Schmid. Scientific Social Survey and Research: An Introduction to the Background, Content, Methods and Analysis of Social Studies. New York: Prentice-Hall, 1949.
Lua MLA (9ú heag.)Young, Pauline, agus Calvin Fisher Schmid. Scientific Social Survey and Research: An Introduction to the Background, Content, Methods and Analysis of Social Studies. Prentice-Hall, 1949.
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