Cita APA (7a ed.)

Ellis, E. (1999). The principle of proportionality in the laws of Europe. Hart.

Cita Chicago Style (17a ed.)

Ellis, Evelyn. The Principle of Proportionality in the Laws of Europe. Oxford [etc.]: Hart, 1999.

Cita MLA (9a ed.)

Ellis, Evelyn. The Principle of Proportionality in the Laws of Europe. Hart, 1999.