APA (7th ed.) Citation

Obermaier, H. The Altamira Caves near Santillana del Mar, Santander. Patronato Nacional del Turismo.

Chicago Style (17th ed.) Citation

Obermaier, Hugo. The Altamira Caves Near Santillana Del Mar, Santander. Madrid: Patronato Nacional del Turismo.

MLA (9th ed.) Citation

Obermaier, Hugo. The Altamira Caves Near Santillana Del Mar, Santander. Patronato Nacional del Turismo.

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