Croswell, K. (2001). Wondering in the dark: Sometimes astronomy's simplest questions are the hardest to answer.
Chicago Style (17th ed.) CitationCroswell, Ken. Wondering in the Dark: Sometimes Astronomy's Simplest Questions Are the Hardest to Answer. 2001.
MLA (9th ed.) CitationCroswell, Ken. Wondering in the Dark: Sometimes Astronomy's Simplest Questions Are the Hardest to Answer. 2001.
Warning: These citations may not always be 100% accurate.