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Dyfyniad Arddull ChicagoErens, Bob, et al. Methodology of the Third British National Survey of Sexual Attitudes and Lifestyles (Natsal-3). BMJ Publishing Group, 2014.
Dyfyniad MLAErens, Bob, et al. Methodology of the Third British National Survey of Sexual Attitudes and Lifestyles (Natsal-3). BMJ Publishing Group, 2014.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.