APA (7th ed.) Zitazioa

Dumortier, F. (1978). Singularities of vector fields. IMPA.

Chicago Style (17th ed.) Zitazioa

Dumortier, Freddy. Singularities of Vector Fields. Rio de Janeiro, Brazil: IMPA, 1978.

MLA (9th ed.) Zitazioa

Dumortier, Freddy. Singularities of Vector Fields. IMPA, 1978.