Westenfelder, M., & Westenfelder, K. M. (2018). Operative Therapie der Hypospadie: Martin Westenfelder, Kay Markus Westenfelder. Springer.
Lua i Stíl Chicago (17ú heag.)Westenfelder, Martin, agus Kay Markus Westenfelder. Operative Therapie Der Hypospadie: Martin Westenfelder, Kay Markus Westenfelder. Berlin: Springer, 2018.
Lua MLA (8ú heag.)Westenfelder, Martin, agus Kay Markus Westenfelder. Operative Therapie Der Hypospadie: Martin Westenfelder, Kay Markus Westenfelder. Springer, 2018.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.