APA (7th ed.) Citation

Ward, R., Modell, B., Petrou, M., Karagozlu, F., & Douratsos, E. (1983). Method of sampling chorionic villi in first trimester of pregnancy under guidance of real time ultrasound. British Medical Journal (Clinical Research Edition), 286(6377), 1542. https://doi.org/10.1136/bmj.286.6377.1542

Chicago Style (17th ed.) Citation

Ward, R.H.T, B. Modell, M. Petrou, F. Karagozlu, and E. Douratsos. "Method of Sampling Chorionic Villi in First Trimester of Pregnancy Under Guidance of Real Time Ultrasound." British Medical Journal (Clinical Research Edition) 286, no. 6377 (1983): 1542. https://doi.org/10.1136/bmj.286.6377.1542.

MLA (9th ed.) Citation

Ward, R.H.T, et al. "Method of Sampling Chorionic Villi in First Trimester of Pregnancy Under Guidance of Real Time Ultrasound." British Medical Journal (Clinical Research Edition), vol. 286, no. 6377, 1983, p. 1542, https://doi.org/10.1136/bmj.286.6377.1542.