Martínez Jorquera, A. (1967). E.T.E.S.A., ECHEVARRI TUBOS ESPECIALES, S.A. [s.n.].
Chicago Style (17th ed.) CitationMartínez Jorquera, Antonio. E.T.E.S.A., ECHEVARRI TUBOS ESPECIALES, S.A. [S.l.]: [s.n.], 1967.
MLA (9th ed.) CitationMartínez Jorquera, Antonio. E.T.E.S.A., ECHEVARRI TUBOS ESPECIALES, S.A. [s.n.], 1967.
Warning: These citations may not always be 100% accurate.