Marx, K., & Marx-Aveling, E. (1899). Secret diplomatic history of the eighteenth century.
Chicago Style (17th ed.) CitationMarx, Karl, and Eleanor Marx-Aveling. Secret Diplomatic History of the Eighteenth Century. 1899.
MLA (8th ed.) CitationMarx, Karl, and Eleanor Marx-Aveling. Secret Diplomatic History of the Eighteenth Century. 1899.
Warning: These citations may not always be 100% accurate.