APA (7 वां संस्करण) प्रशस्ति पत्र

Drabek, P., Kufner, A., & Nicolosi, F. (1997). Quasilinear elliptic equations with degenerations and singularities. W. de Gruyter.

शिकागो शैली (17वां संस्करण) प्रशस्ति पत्र

Drabek, P., Alois Kufner, और Francesco Nicolosi. Quasilinear Elliptic Equations with Degenerations and Singularities. Berlin ; New York: W. de Gruyter, 1997.

एमएलए (9वां संस्करण) प्रशस्ति पत्र

Drabek, P., et al. Quasilinear Elliptic Equations with Degenerations and Singularities. W. de Gruyter, 1997.