APA
Kowalik P., . (1995). Constructed wetlands for wastewater treatment from small communities. Gdansk: Wydawnictwo Politechniki Gdanskiej.
Chicago
Kowalik Piotr, . 1995. Constructed wetlands for wastewater treatment from small communities. Gdansk: Wydawnictwo Politechniki Gdanskiej.
Harvard
Kowalik P., . (1995). Constructed wetlands for wastewater treatment from small communities. Gdansk: Wydawnictwo Politechniki Gdanskiej.
MLA
Kowalik Piotr, . Constructed wetlands for wastewater treatment from small communities. Gdansk: Wydawnictwo Politechniki Gdanskiej. 1995.