APA (7th ed.) Citation

Gutteridge, W., Collin, C., Waters, W., Black, J. F., McLarty, D. G., Mtasiwa, D., . . . Hales, C. (1994). LETTERS. BMJ: British Medical Journal (International Edition), 308(6927), 531.

Chicago Style (17th ed.) Citation

Gutteridge, W., et al. "LETTERS." BMJ: British Medical Journal (International Edition) 308, no. 6927 (1994): 531.

MLA (9th ed.) Citation

Gutteridge, W., et al. "LETTERS." BMJ: British Medical Journal (International Edition), vol. 308, no. 6927, 1994, p. 531.