Roxborough, I. (1986). Teori-teori keterbelakangan. LP3ES.
Chicago Style (17th ed.) CitationRoxborough, Ian. Teori-teori Keterbelakangan. LP3ES, 1986.
MLA (8th ed.) CitationRoxborough, Ian. Teori-teori Keterbelakangan. LP3ES, 1986.
Warning: These citations may not always be 100% accurate.