Ohler, R. (1927). Zur Jugendwohlfahrtspflege.
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芝加哥风格引文
Ohler, Rudolf. Zur Jugendwohlfahrtspflege. 1927.
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MLA引文
Ohler, Rudolf. Zur Jugendwohlfahrtspflege. 1927.
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警告：这些引文格式不一定是100％准确.