Explanation:

- D. Forde: Known for contributions to anthropology and sociology, but the quote doesn't align with Forde's typical work.

- Elliot and Merrill: Renowned sociologists who wrote extensively about interactions that form social structures, but the specific quote isn't attributed to them.

- Green: The correct source of the quote. Green highlights how institutions reflect society's customs and norms serving social functions.

- Ginsberg: Focused on philosophy and political science, with a different emphasis in studying institutions.