Cita APA (7a ed.)
(1991). Aids prevention in Switzerland. s.n.].
Cita Chicago Style (17a ed.)
Aids Prevention in Switzerland. [S.l: s.n.], 1991.
Cita MLA (9a ed.)
Aids Prevention in Switzerland. s.n.], 1991.
Precaución: Estas citas no son 100% exactas.