Leffingwell, A. An ethical problem; or, Sidelights upon scientific experimentation on man and animals.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रLeffingwell, Albert. An Ethical Problem; or, Sidelights upon Scientific Experimentation on Man and Animals.
एमएलए (9वां संस्करण) प्रशस्ति पत्रLeffingwell, Albert. An Ethical Problem; or, Sidelights upon Scientific Experimentation on Man and Animals.
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