Παραπομπή σε μορφή APA (7η εκδ.)

Serrano Gm̤ez Hugo. Law project 133 , [special rules for the exploration, exploitation, treatment, refining and transportation of heavy oil in Colombia].

Παραπομπή σε μορφή Chicago (17η εκδ.)

Serrano Gm̤ez Hugo. Law Project 133 , [special Rules for the Exploration, Exploitation, Treatment, Refining and Transportation of Heavy Oil in Colombia].

Παραπομπή σε μορφή MLA (9th εκδ.)

Serrano Gm̤ez Hugo. Law Project 133 , [special Rules for the Exploration, Exploitation, Treatment, Refining and Transportation of Heavy Oil in Colombia].