Lee, R. M. (2000). Unobtrusive methods in social research. Open University Press.
芝加哥风格引文Lee, Raymond M. Unobtrusive Methods in Social Research. Buckingham [England]: Open University Press, 2000.
MLA引文Lee, Raymond M. Unobtrusive Methods in Social Research. Open University Press, 2000.
警告：这些引文格式不一定是100％准确.