Construction of Cotabato International airport and seaport to begin next year. IN Shipping. Manila Bulletin.
Chicago-referens (17:e uppl.)"Construction of Cotabato International Airport and Seaport to Begin Next Year. IN Shipping." Manila Bulletin .
MLA-referens (9:e uppl.)"Construction of Cotabato International Airport and Seaport to Begin Next Year. IN Shipping." Manila Bulletin, .
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