APA (7th ed.) Citation

Collander, R., Erkamo, V., & Lehtonen, P. (1973). Bibliographia botanica Fenniae: 1901 - 1950.

Chicago Style (17th ed.) Citation

Collander, Runar, Viljo Erkamo, and Pirkko Lehtonen. Bibliographia Botanica Fenniae: 1901 - 1950. Helsinki, 1973.

MLA (9th ed.) Citation

Collander, Runar, et al. Bibliographia Botanica Fenniae: 1901 - 1950. 1973.