APA (7th ed.) Citation

Billy, G., & Romer, A. (2021). Please hold the line. Circon Verlag GmbH.

Chicago Style (17th ed.) Citation

Billy, Gina, and Alison Romer. Please Hold the Line. München: Circon Verlag GmbH, 2021.

MLA (9th ed.) Citation

Billy, Gina, and Alison Romer. Please Hold the Line. Circon Verlag GmbH, 2021.