Cita APA (7a ed.)

Siemens. (1998). PRISMA: Hearing solutions that help. Siemens.

Cita Chicago Style (17a ed.)

Siemens. PRISMA: Hearing Solutions That Help. Nürenberg: Siemens, 1998.

Cita MLA (9a ed.)

Siemens. PRISMA: Hearing Solutions That Help. Siemens, 1998.