APA (7th ed.) Citation

Stetkær, H. (2013). Functional equations on groups. World Scientific.

Chicago Style (17th ed.) Citation

Stetkær, Henrik. Functional Equations on Groups. Singapore ; Hackensack, N.J.: World Scientific, 2013.

MLA (9th ed.) Citation

Stetkær, Henrik. Functional Equations on Groups. World Scientific, 2013.