Gallup, G. H. (1948). A guide to public opinion polls. Princeton University Press.
Chicagoスタイル(17版)引用形式Gallup, George Horace. A Guide to Public Opinion Polls. Princeton: Princeton University Press, 1948.
MLA(9版)引用形式Gallup, George Horace. A Guide to Public Opinion Polls. Princeton University Press, 1948.
警告: この引用は必ずしも正確ではありません.