Chamberlain, G., Wraight, A., Steer, P., & Brain, M. (1993). Pain and its relief in childbirth: The results of a national survey conducted by the national birthday trust. Churchill Livingstone.
Παραπομπή σε μορφή Chicago (17η εκδ.)Chamberlain, Geoffrey, Ann Wraight, Philip Steer, και Margaret Brain. Pain and Its Relief in Childbirth: The Results of a National Survey Conducted by the National Birthday Trust. Edinburgh: Churchill Livingstone, 1993.
Παραπομπή σε μορφή MLA (8th εκδ.)Chamberlain, Geoffrey, et al. Pain and Its Relief in Childbirth: The Results of a National Survey Conducted by the National Birthday Trust. Churchill Livingstone, 1993.
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