APA (7th ed.) Citation

Hallwag AG. (1971). España, Portugal. Hallwag Publishers.

Chicago Style (17th ed.) Citation

Hallwag AG. España, Portugal. Bern: Hallwag Publishers, 1971.

MLA (9th ed.) Citation

Hallwag AG. España, Portugal. Hallwag Publishers, 1971.

Warning: These citations may not always be 100% accurate.