Cita APA (7th ed.)

Sharp, C. L. E. H., & Keen, H. (1968). Presymptomatic detection and early diagnosis: A critical appraisal. Pitman Medical.

Cita Chicago (17th ed.)

Sharp, Clive Lechmere Ellis Hicks, i Harry Keen. Presymptomatic Detection and Early Diagnosis: A Critical Appraisal. London: Pitman Medical, 1968.

Cita MLA (8th ed.)

Sharp, Clive Lechmere Ellis Hicks, i Harry Keen. Presymptomatic Detection and Early Diagnosis: A Critical Appraisal. Pitman Medical, 1968.