http://www.eltiempo.com/archivo/documento/CMS-3009851 - Spanish bibliographies - in Harvard style

In-text: (REPORT: BLOWOUT RISK EVALUATION - LABRADOR SEA SOUTH-WEST OF GREENLAND, 2011)

Your Bibliography: 2011. REPORT: BLOWOUT RISK EVALUATION - LABRADOR SEA SOUTH-WEST OF GREENLAND. [ebook] pp.18-19. Available at: <http://dce.au.dk/fileadmin/dce.au.dk/Udgivelser/Appendix_2_Blowout_risk_in_the_Labrador_Sea.pdf> [Accessed 4 November 2017].

In-text: (Well Control Methods, 2017)

Your Bibliography: 2017. Well Control Methods. [ebook] p.4. Available at: <http://wildwell.com/literature-on-demand/literature/well-control-methods.pdf> [Accessed 1 November 2017].

In-text: (Duggan, 2017)

Your Bibliography: Duggan, T., 2017. How to Get the Job Done When Performing Repetitive Tasks. [online] Work.chron.com. Available at: <http://work.chron.com/job-done-performing-repetitive-tasks-16351.html> [Accessed 1 November 2017].

In-text: (El Tiempo, 2006)

Your Bibliography: El Tiempo, R., 2006. Nueve trabajadores resultaron heridos en explosión de campo de exploración petrolera. [online] El Tiempo. Available at: <http://www.eltiempo.com/archivo/documento/CMS-3009851> [Accessed 1 November 2017].

In-text: (annular blowout preventer - Schlumberger Oilfield Glossary, 2017)

Your Bibliography: Glossary.oilfield.slb.com. 2017. annular blowout preventer - Schlumberger Oilfield Glossary. [online] Available at: <http://www.glossary.oilfield.slb.com/en/Terms/a/annular_blowout_preventer.aspx> [Accessed 1 November 2017].

In-text: (Lake and Mitchell, 2006)

Your Bibliography: Lake, L. and Mitchell, R., 2006. Petroleum engineering handbook, Volume II Drilling Engineering. Richardson, TX: Society of Petroleum Engineers, pp.186-187.