Westenfelder, M., & Westenfelder, K. M. (2018). Operative Therapie der Hypospadie: Martin Westenfelder, Kay Markus Westenfelder. Springer.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रWestenfelder, Martin, और Kay Markus Westenfelder. Operative Therapie Der Hypospadie: Martin Westenfelder, Kay Markus Westenfelder. Berlin: Springer, 2018.
एमएलए (8वां संस्करण) प्रशस्ति पत्रWestenfelder, Martin, और Kay Markus Westenfelder. Operative Therapie Der Hypospadie: Martin Westenfelder, Kay Markus Westenfelder. Springer, 2018.
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