Cita APA

British Medical Association and Royal Pharmaceutical Society of Great Britain. (1990). British National Formulary (Number 20 (September 1990).). British Medical Association and Royal Pharmaceutical Society of Great Britain.

Citación estilo Chicago

British Medical Association and Royal Pharmaceutical Society of Great Britain. British National Formulary. Number 20 (September 1990). London: British Medical Association and Royal Pharmaceutical Society of Great Britain, 1990.

Cita MLA

British Medical Association and Royal Pharmaceutical Society of Great Britain. British National Formulary. Number 20 (September 1990). British Medical Association and Royal Pharmaceutical Society of Great Britain, 1990.