APA (7th ed.) Citation

O'Brien, E., & O'Malley, K. Blood Pressure Measurement.

Chicago Style (17th ed.) Citation

O'Brien, E., and K. O'Malley. Blood Pressure Measurement.

MLA (9th ed.) Citation

O'Brien, E., and K. O'Malley. Blood Pressure Measurement.

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