APA

Zingstra H., Ancheva K. & Anceva K. D. (2009). Guidelines for assessing favourable conservation status of Natura 2000 species and habitat types in Bulgaria. : Bulg. Biodiversity Found.

Chicago

Zingstra Henk, Ancheva Katya and Anceva Katja Draganova. 2009. Guidelines for assessing favourable conservation status of Natura 2000 species and habitat types in Bulgaria. : Bulg. Biodiversity Found.

Harvard

Zingstra H., Ancheva K. and Anceva K. D. (2009). Guidelines for assessing favourable conservation status of Natura 2000 species and habitat types in Bulgaria. : Bulg. Biodiversity Found.

MLA

Zingstra Henk, Ancheva Katya and Anceva Katja Draganova. Guidelines for assessing favourable conservation status of Natura 2000 species and habitat types in Bulgaria. : Bulg. Biodiversity Found. 2009.