Cita APA (7a ed.)

Skowron, A., & Polkowski, L. (1998). Rough sets in knowledge discovery. Physica-Verlag.

Cita Chicago Style (17a ed.)

Skowron, Andrzej, y Lech Polkowski. Rough Sets in Knowledge Discovery. Heidelberg, [etc.]: Physica-Verlag, 1998.

Cita MLA (9a ed.)

Skowron, Andrzej, y Lech Polkowski. Rough Sets in Knowledge Discovery. Physica-Verlag, 1998.