Castles, L. (1973). The political life of a Sumatran residency: Tapanuli, 1915-1940. University Microfilms International.
Chicago Style (17th ed.) CitationCastles, Lance. The Political Life of a Sumatran Residency: Tapanuli, 1915-1940. Ann Arbor: University Microfilms International, 1973.
MLA (9th ed.) CitationCastles, Lance. The Political Life of a Sumatran Residency: Tapanuli, 1915-1940. University Microfilms International, 1973.
Warning: These citations may not always be 100% accurate.