APA (7th ed.) Citation

Cengel, K. A., Belal, Z., Kim, M. M., Hagan, S., Camps, S., Kalinin, A., . . . Tschabrunn, C. Cardiorespiratory-gated cardiac proton radiotherapy using a novel ultrasound guidance system. Elsevier.

Chicago Style (17th ed.) Citation

Cengel, Keith A., et al. Cardiorespiratory-gated Cardiac Proton Radiotherapy Using a Novel Ultrasound Guidance System. Elsevier.

MLA (9th ed.) Citation

Cengel, Keith A., et al. Cardiorespiratory-gated Cardiac Proton Radiotherapy Using a Novel Ultrasound Guidance System. Elsevier.

Warning: These citations may not always be 100% accurate.