Eastman. (1961). Williams obstetrics. Appleton Century-crofts.
Chicagoスタイル(17版)引用形式Eastman. Williams Obstetrics. Appleton Century-crofts, 1961.
MLA(9版)引用形式Eastman. Williams Obstetrics. Appleton Century-crofts, 1961.
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APA(7版)引用形式