Gradziuk, B., & Gradziuk, P. (2015). Foreign Trade of Biomass for Energy Purposes in Poland in the Years 2008–2014. Akademia Zamojska.
Chicago Style (17th ed.) CitationGradziuk, Barbara, and Piotr Gradziuk. Foreign Trade of Biomass for Energy Purposes in Poland in the Years 2008–2014. Akademia Zamojska, 2015.
MLA (9th ed.) CitationGradziuk, Barbara, and Piotr Gradziuk. Foreign Trade of Biomass for Energy Purposes in Poland in the Years 2008–2014. Akademia Zamojska, 2015.
Warning: These citations may not always be 100% accurate.