Cita APA (7a ed.)

Gerberding, E., & Pluta-Kus, M. (2013). Petersburg. DuMont Reiseverlag.

Cita Chicago Style (17a ed.)

Gerberding, Eva, y Maria Pluta-Kus. Petersburg. Ostfildern: DuMont Reiseverlag, 2013.

Cita MLA (9a ed.)

Gerberding, Eva, y Maria Pluta-Kus. Petersburg. DuMont Reiseverlag, 2013.