APA (7th ed.) Citation

Seabra, E., Puga, H., & Costa, J. (2017). Oil-hydraulic power units - state of the art.

Chicago Style (17th ed.) Citation

Seabra, Eurico, Hélder Puga, and Jorge Costa. Oil-hydraulic Power Units - State of the Art. 2017.

MLA (8th ed.) Citation

Seabra, Eurico, et al. Oil-hydraulic Power Units - State of the Art. 2017.