Cita APA (7a ed.)

Clark, D. W. (1981). Preventive and community medicine (2ª ed.). Little, Brown.

Cita Chicago Style (17a ed.)

Clark, Duncan W. Preventive and Community Medicine. 2ª ed. Little, Brown, 1981.

Cita MLA (9a ed.)

Clark, Duncan W. Preventive and Community Medicine. 2ª ed. Little, Brown, 1981.