Cita APA (7th ed.)
Opovits, S., Siren, K., & Siren, H. (1977). SIREN, Kaija + Heikki.
Cita Chicago (17th ed.)
Opovits, Sara, Kaija Siren, i Heikki Siren. SIREN, Kaija + Heikki. 1977.
Cita MLA (9th ed.)
Opovits, Sara, et al. SIREN, Kaija + Heikki. 1977.
Atenció: Aquestes cites poden no estar 100% correctes.