Παραπομπή APA

(2018). HBR's 10 must reads on mental toughness: With bonus interview of Martin E.P. Seligman. Boston, Massachusetts: Harvard Business Review.

Παραπομπή Chicago Style

HBR's 10 Must Reads On Mental Toughness: With Bonus Interview of Martin E.P. Seligman. Boston, Massachusetts: Harvard Business Review, 2018.

Παραπομπή MLA

HBR's 10 Must Reads On Mental Toughness: With Bonus Interview of Martin E.P. Seligman. Boston, Massachusetts: Harvard Business Review, 2018.

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