APA (7th ed.) Citation

Jannsen, N., & Sonnenberg, N. Gas and electricity prices. Sciendo.

Chicago Style (17th ed.) Citation

Jannsen, Nils, and Nils Sonnenberg. Gas and Electricity Prices. Sciendo.

MLA (9th ed.) Citation

Jannsen, Nils, and Nils Sonnenberg. Gas and Electricity Prices. Sciendo.

Warning: These citations may not always be 100% accurate.