Tohutoro APA (7th ed.)
Beischer, N. A. Obstetricia y neonatologia (3a. ed.). McGraw-Hill.
Tohutoru Kātū Chicago (17th ed.)
Beischer, Norman A. Obstetricia Y Neonatologia. 3a. ed. Mexico: McGraw-Hill.
Tohutoro MLA (9th ed.)
Beischer, Norman A. Obstetricia Y Neonatologia. 3a. ed. McGraw-Hill.
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