1 Abraham Maslow, Motivation and Personality, 2nd ed. (New York: Harper & Row, 1970), 46.
2 Abraham Maslow, Motivation and Personality, 2nd ed. (New York: Harper & Row, 1970), 46.
3 Viktor Frankl, The Unheard Cry for Meaning (New York: Simon & Schuster, 1978), 21.