Cita APA (7a ed.)

Nichols, I. C. (1971). The European Pentarchy and the Congress of Verona, 1822. Martinus Nijhoff.

Cita Chicago Style (17a ed.)

Nichols, Irby Coghill. The European Pentarchy and the Congress of Verona, 1822. The Hague: Martinus Nijhoff, 1971.

Cita MLA (9a ed.)

Nichols, Irby Coghill. The European Pentarchy and the Congress of Verona, 1822. Martinus Nijhoff, 1971.