Philippines (Republic). Office of the President & Presidential Economic Staff. (1969). Provincial profile of Sulu. s.n.
Citace podle Chicago (17th ed.)Philippines (Republic). Office of the President a Presidential Economic Staff. Provincial Profile of Sulu. [Manila: s.n, 1969.
Citace podle MLA (9th ed.)Philippines (Republic). Office of the President a Presidential Economic Staff. Provincial Profile of Sulu. s.n, 1969.
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