APA (7th ed.) Citation
Laurila, A., Nikula, R., & Nykänen, A. (1998). Helsinki (1. vydanie.). The City of Helsinki.
Chicago Style (17th ed.) Citation
Laurila, Aarne, Riitta Nikula, and Anna-Stiina Nykänen. Helsinki. 1. vydanie. Helsinki: The City of Helsinki, 1998.
MLA (9th ed.) Citation
Laurila, Aarne, et al. Helsinki. 1. vydanie. The City of Helsinki, 1998.
Warning: These citations may not always be 100% accurate.