Clayton,, S. G. (1967). A Pocket Obstetrics (6th ed.). J.& A. Churchill.
Tohutoru Kātū Chicago (17th ed.)Clayton,, Stanley G. A Pocket Obstetrics. 6th ed. London: J.& A. Churchill, 1967.
Tohutoro MLA (9th ed.)Clayton,, Stanley G. A Pocket Obstetrics. 6th ed. J.& A. Churchill, 1967.
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