APA (7th ed.) Citation

Cardoso, N., Cruz, D., Chaves, M., & Silva, M. (2012). Using Geographic Signatures as Query and Document Scopes in Geographic IR.

Chicago Style (17th ed.) Citation

Cardoso, Nuno, David Cruz, Marcirio Chaves, and Mário Silva. Using Geographic Signatures as Query and Document Scopes in Geographic IR. 2012.

MLA (8th ed.) Citation

Cardoso, Nuno, et al. Using Geographic Signatures as Query and Document Scopes in Geographic IR. 2012.