Only knowledge that is used sticks in your mind.
About Dale Carnegie
Dale Carnegie was an American writer and lecturer, and the developer of courses in self-improvement, salesmanship, corporate training, public speaking, and interpersonal skills.
Only knowledge that is used sticks in your mind.
About Dale Carnegie
Dale Carnegie was an American writer and lecturer, and the developer of courses in self-improvement, salesmanship, corporate training, public speaking, and interpersonal skills.
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