Psihologija uspjeha I : Kako steći prijatelje i naklonost ljudi

Author Dale Carnegie says that only those who constantly test and examine their attitudes and ideas can make progress in life. Studies have shown that even in highly skilled technical positions, only about 15 percent of a person's financial success depends on their professional knowledge, and 85 percent on their interpersonal skills. This requires a lot of energy, practice, and a real desire to succeed.