Young, P. (1968). Scientific social surveys & research (4th.). Prentice Hall of India.
Lua i Stíl Chicago (17ú heag.)Young, Pauline. Scientific Social Surveys & Research. 4th. Delhi: Prentice Hall of India, 1968.
Lua MLA (9ú heag.)Young, Pauline. Scientific Social Surveys & Research. 4th. Prentice Hall of India, 1968.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.