APA (7th ed.) Citation

Ospina, T. Proceedings of the second Pan American scientific congress: Geologia general y económica de Colombia.

Chicago Style (17th ed.) Citation

Ospina, Tulio. Proceedings of the Second Pan American Scientific Congress: Geologia General Y Económica De Colombia.

MLA (9th ed.) Citation

Ospina, Tulio. Proceedings of the Second Pan American Scientific Congress: Geologia General Y Económica De Colombia.

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