Playfair, W. S., & Harris, R. P. (1880). A treatise on the science and practice of midwifery (3d American ed.). H. C. Lea.
Citace podle Chicago (17th ed.)Playfair, W. S., a Robert Patterson Harris. A Treatise on the Science and Practice of Midwifery. 3d American ed. Philadelphia: H. C. Lea, 1880.
Citace podle MLA (8th ed.)Playfair, W. S., a Robert Patterson Harris. A Treatise on the Science and Practice of Midwifery. 3d American ed. H. C. Lea, 1880.
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