Umbgrove, J. (1950). Symphony of the earth. Martinus Nijhoff.
Chicago Style (17th ed.) CitationUmbgrove, JHF. Symphony of the Earth. Martinus Nijhoff, 1950.
MLA (8th ed.) CitationUmbgrove, JHF. Symphony of the Earth. Martinus Nijhoff, 1950.
Warning: These citations may not always be 100% accurate.