Mariǫ Martn̕ez Jorge Eličer, Mojica Amaya Angľica, & Universidad Pedagg̤ica y Tecnolg̤ica de Colombia - UPTC. Relation Between Coal Petrography and Gas Content in the Amag ̀Formation (Antioquia, Colombia).
Chicago-viite (17. p.)Mariǫ Martn̕ez Jorge Eličer, Mojica Amaya Angľica, ja Universidad Pedagg̤ica y Tecnolg̤ica de Colombia - UPTC. Relation Between Coal Petrography and Gas Content in the Amag ̀Formation (Antioquia, Colombia).
MLA-viite (9. p.)Mariǫ Martn̕ez Jorge Eličer, et al. Relation Between Coal Petrography and Gas Content in the Amag ̀Formation (Antioquia, Colombia).
Varoitus: Nämä viitteet eivät aina ole täysin luotettavia.