Arlt, R. (2011). The sunspot observations by Samuel Heinrich Schwabe.
Chicago Style (17th ed.) CitationArlt, R. The Sunspot Observations by Samuel Heinrich Schwabe. 2011.
MLA (9th ed.) CitationArlt, R. The Sunspot Observations by Samuel Heinrich Schwabe. 2011.
Warning: These citations may not always be 100% accurate.