Cita APA (7th ed.)

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

Cita Chicago (17th ed.)

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

Cita MLA (9th ed.)

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