Cita APA (7th ed.)

UNIDROIT. (1994). Principles of international commercial contracts. Unidroit.

Cita Chicago (17th ed.)

UNIDROIT. Principles of International Commercial Contracts. Roma: Unidroit, 1994.

Cita MLA (9th ed.)

UNIDROIT. Principles of International Commercial Contracts. Unidroit, 1994.