Cita APA (7th ed.)

Bolívar-León, R., Triviño-Jaimes, N. R., & García-Mogollón, J. M. (2014). A Technical and Environmental Study of Fortified Structures Used in Coal Mining in Norte de Santander. Universidad Pedagógica y Tecnológica de Colombia.

Cita Chicago (17th ed.)

Bolívar-León, Rafael, Neyl Richard Triviño-Jaimes, i Javier Mauricio García-Mogollón. A Technical and Environmental Study of Fortified Structures Used in Coal Mining in Norte De Santander. Universidad Pedagógica y Tecnológica de Colombia, 2014.

Cita MLA (9th ed.)

Bolívar-León, Rafael, et al. A Technical and Environmental Study of Fortified Structures Used in Coal Mining in Norte De Santander. Universidad Pedagógica y Tecnológica de Colombia, 2014.