Concern. [s. n. ].
Chicago Style (17th ed.) CitationConcern. Koronadal, South Cotabato: [s. n. ].
MLA引文Concern. [s. n. ].
警告：這些引文格式不一定是100％准確.
APA引文
Concern. [s. n. ].
Chicago Style (17th ed.) CitationConcern. Koronadal, South Cotabato: [s. n. ].
MLA引文Concern. [s. n. ].