Cita APA (7th ed.)

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.

Cita Chicago (17th ed.)

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 (9th ed.)

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.