APA (7th ed.) Citation

Hellén, W. (1931). Zur Kenntnis der Cynipiden-Fauna Islands. Elander.

Chicago Style (17th ed.) Citation

Hellén, Wolter. Zur Kenntnis Der Cynipiden-Fauna Islands. Göteborg: Elander, 1931.

MLA (9th ed.) Citation

Hellén, Wolter. Zur Kenntnis Der Cynipiden-Fauna Islands. Elander, 1931.