APA (7th ed.) Citation

Gueorguiev, V. B., & Gueorguiev, B. V. (1995). Catalogue of the ground-beetles of Bulgaria (Coleoptera: Carabidae). Pensoft.

Chicago Style (17th ed.) Citation

Gueorguiev, Vassil B., and Borislav V. Gueorguiev. Catalogue of the Ground-beetles of Bulgaria (Coleoptera: Carabidae). Sofia: Pensoft, 1995.

MLA (9th ed.) Citation

Gueorguiev, Vassil B., and Borislav V. Gueorguiev. Catalogue of the Ground-beetles of Bulgaria (Coleoptera: Carabidae). Pensoft, 1995.