Cita APA (7a ed.)

Smietana, W., & Klimek, A. (1993). Diet of wolves in the Bieszczady Mountains, Poland. [s.n.].

Cita Chicago Style (17a ed.)

Smietana, Wojciech, y Agata Klimek. Diet of Wolves in the Bieszczady Mountains, Poland. [S.l.]: [s.n.], 1993.

Cita MLA (9a ed.)

Smietana, Wojciech, y Agata Klimek. Diet of Wolves in the Bieszczady Mountains, Poland. [s.n.], 1993.