APA (7th ed.) Citation

Grotkowski, R., & Astor, E. (2012). Morza i oceany. Weltbild.

Chicago Style (17th ed.) Citation

Grotkowski, Robert, and Ellen Astor. Morza I Oceany. Warszawa: Weltbild, 2012.

MLA (9th ed.) Citation

Grotkowski, Robert, and Ellen Astor. Morza I Oceany. Weltbild, 2012.

Warning: These citations may not always be 100% accurate.