Young, P. (1968). Scientific social surveys & research (4th.). Prentice Hall of India.
Dyfyniad Arddull ChicagoYoung, Pauline. Scientific Social Surveys & Research. 4th. Delhi: Prentice Hall of India, 1968.
Dyfyniad MLAYoung, Pauline. Scientific Social Surveys & Research. 4th. Prentice Hall of India, 1968.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.