Becerra-Becerra, J. E., & Costa, A. G. (2008). Use specifications of ornamental rocks based in accelerated ageing tests. Universidad Pedagógica y Tecnológica de Colombia - UPTC.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रBecerra-Becerra, Javier Eduardo, और Antonio Gilberto Costa. Use Specifications of Ornamental Rocks Based in Accelerated Ageing Tests. Universidad Pedagógica y Tecnológica de Colombia - UPTC, 2008.
एमएलए (9वां संस्करण) प्रशस्ति पत्रBecerra-Becerra, Javier Eduardo, और Antonio Gilberto Costa. Use Specifications of Ornamental Rocks Based in Accelerated Ageing Tests. Universidad Pedagógica y Tecnológica de Colombia - UPTC, 2008.
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