APA (7th ed.) Citation

Chaves, M., Silva, M. J., & Martins, B. (2010). GKB - Geographic Knowledge Base.

Chicago Style (17th ed.) Citation

Chaves, Marcirio, Mário J. Silva, and Bruno Martins. GKB - Geographic Knowledge Base. 2010.

MLA (8th ed.) Citation

Chaves, Marcirio, et al. GKB - Geographic Knowledge Base. 2010.