Haeckel, E. (2013). Report on the Radiolaria Collected by H.M.S. Challenger During the Years 1873-1876, Plates Report on the Scientific Results of the Voyage of H.M.S. Challenger During the Years 1873-76, Vol. XVIII. Project Gutenberg.
Chicago Style (17th ed.) CitationHaeckel, Ernst. Report on the Radiolaria Collected by H.M.S. Challenger During the Years 1873-1876, Plates Report on the Scientific Results of the Voyage of H.M.S. Challenger During the Years 1873-76, Vol. XVIII. Project Gutenberg, 2013.
MLA (9th ed.) CitationHaeckel, Ernst. Report on the Radiolaria Collected by H.M.S. Challenger During the Years 1873-1876, Plates Report on the Scientific Results of the Voyage of H.M.S. Challenger During the Years 1873-76, Vol. XVIII. Project Gutenberg, 2013.
Warning: These citations may not always be 100% accurate.