Paul, R. E. (1986). J.C. Kapteyn and the Early Twentieth-Century Universe.
Chicago Style (17th ed.) CitationPaul, Robert E. J.C. Kapteyn and the Early Twentieth-Century Universe. 1986.
MLA (9th ed.) CitationPaul, Robert E. J.C. Kapteyn and the Early Twentieth-Century Universe. 1986.
Warning: These citations may not always be 100% accurate.