MLA

Balabanova, Biljana, and Trajče Stafilov. Contaminant Levels and Ecological Effects. Springer International Publishing, 2021.

APA

Balabanova, B., & Stafilov, T. (2021). Contaminant Levels and Ecological Effects. Springer International Publishing.

Chicago

Balabanova, Biljana, and Trajče Stafilov. Contaminant Levels and Ecological Effects. : Springer International Publishing, 2021.