Evans, H. L. (1936). A world of people: A study of the world friendship attitudes of 600 intermediates. Presbyterian Board of Christian Education.
Lua i Stíl Chicago (17ú heag.)Evans, Hazel L. A World of People: A Study of the World Friendship Attitudes of 600 Intermediates. Philadelphia: Presbyterian Board of Christian Education, 1936.
Lua MLA (8ú heag.)Evans, Hazel L. A World of People: A Study of the World Friendship Attitudes of 600 Intermediates. Presbyterian Board of Christian Education, 1936.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.