APA
Maruszczak H., Starkel L., . (1997). Anthropogenic impact on water conditions: (Vistula and oder river basins). Warszawa: PAN. IGiPZ.
Chicago
Maruszczak Henryk, Starkel Leszek, . 1997. Anthropogenic impact on water conditions: (Vistula and oder river basins). Warszawa: PAN. IGiPZ.
Harvard
Maruszczak H., Starkel L., . (1997). Anthropogenic impact on water conditions: (Vistula and oder river basins). Warszawa: PAN. IGiPZ.
MLA
Maruszczak Henryk, Starkel Leszek, . Anthropogenic impact on water conditions: (Vistula and oder river basins). Warszawa: PAN. IGiPZ. 1997.