支持姐姐！。。。

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谢谢楼主，看看

Intended as a text for graduate or advanced undergraduate courses in research methods (design) in psychology, communication, sociology, education, public health, and marketing, an introductory undergraduate course on research methods is recommended.

谢谢分享

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多谢Kychan的无私分享！

thanksa lot

Principles and Methods of Social Research

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谢谢分享

thanks a lot

very interesting

谢谢楼主的分享！！！

谢谢你的好书！

谢谢分享！

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thanks