Usman. (1988). Aturan Bea Materai. PT. Refika Aditama.
Chicago Style (17th ed.) CitationUsman. Aturan Bea Materai. PT. Refika Aditama, 1988.
MLA (8th ed.) CitationUsman. Aturan Bea Materai. PT. Refika Aditama, 1988.
Warning: These citations may not always be 100% accurate.