Cita APA (7a ed.)

Peffer, R. S. (1984). Catalonia: Spain's country within a country. National Geographic Society.

Cita Chicago Style (17a ed.)

Peffer, Randall S. Catalonia: Spain's Country Within a Country. Washington, D.C.: National Geographic Society, 1984.

Cita MLA (9a ed.)

Peffer, Randall S. Catalonia: Spain's Country Within a Country. National Geographic Society, 1984.