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