Cita APA (7a ed.)
Baláž, P., & Zábojník, S. Natural Gas and Its Status in Energy Security of the European Union.
Cita Chicago Style (17a ed.)
Baláž, Peter, y Stanislav Zábojník. Natural Gas and Its Status in Energy Security of the European Union.
Cita MLA (9a ed.)
Baláž, Peter, y Stanislav Zábojník. Natural Gas and Its Status in Energy Security of the European Union.
Precaución: Estas citas no son 100% exactas.