資料來源：

Forbes. 15 ways you can find the confidence to speak up.

Ian Frost Education. Being more assertive: Speaking up in meetings.

Indeed. Why it's important to speak up at work (and how to do it).

LinkedIn. 15 ways to build the confidence to speak up at work still holding back in meetings? You're not alone.

LinkedIn. Finding your voice: The power of speaking up for workplace change.

Medium. The ultimate how-to guide for speaking up at work.

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Science of People. 11 best strategies to build confidence in the workplace.