Cita APA

(1970). Primary and secondary syphilis. Country of origin study, 1969. British Cooperative Clinical Group.

Chicago Style Citation

Primary and Secondary Syphilis. Country of Origin Study, 1969. British Cooperative Clinical Group. 1970.

Cita MLA

Primary and Secondary Syphilis. Country of Origin Study, 1969. British Cooperative Clinical Group. 1970.

Atenció: Aquestes cites poden no estar 100% correctes.