Philippines. Department of Energy. (2012). Department Circular No. DC 2012-05-006: Guidelines on the accreditation of coal traders and registration of coal end-users. Philippine Daily Inquirer.
Citace podle Chicago (17th ed.)Philippines. Department of Energy. "Department Circular No. DC 2012-05-006: Guidelines on the Accreditation of Coal Traders and Registration of Coal End-users." Philippine Daily Inquirer 2012.
Citace podle MLA (9th ed.)Philippines. Department of Energy. "Department Circular No. DC 2012-05-006: Guidelines on the Accreditation of Coal Traders and Registration of Coal End-users." Philippine Daily Inquirer, 2012.
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