APA (7th ed.) Citation

Alva, A. J. (1950). Geología general. s.n.

Chicago Style (17th ed.) Citation

Alva, Alcides J. Geología General. s.n, 1950.

MLA (9th ed.) Citation

Alva, Alcides J. Geología General. s.n, 1950.

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