Maxwell, R. (1992). Gatekeepers and goalkeepers: General practice advice to purchasers.
Citación estilo ChicagoMaxwell, R. Gatekeepers and Goalkeepers: General Practice Advice to Purchasers. 1992.
Cita MLAMaxwell, R. Gatekeepers and Goalkeepers: General Practice Advice to Purchasers. 1992.
Nota: a formatação da citação pode não corresponder 100% ao definido pela respectiva norma.