Rujukan Kemanusiaan (nilai)

  1. ↑ Peterson & Seligman 2004, p. 34.
  2. ↑ Peterson & Seligman 2004, p. 28.
  3. 1 2 Peterson & Seligman 2004, p. 40.
  4. ↑ Chan 1955, p. 296.
  5. ↑ Chan 1955, p. 298.
  6. ↑ Chan 1955, p. 312.