APA (7th ed.) Citation

Ramos, A., Relvas, C., Completo, A., & Simões, J. A. (2011). A new cemented hip prosthesis concept.

Chicago Style (17th ed.) Citation

Ramos, António, Carlos Relvas, António Completo, and José A. Simões. A New Cemented Hip Prosthesis Concept. 2011.

MLA (8th ed.) Citation

Ramos, António, et al. A New Cemented Hip Prosthesis Concept. 2011.