Campbell, L., & Jacchia, L. G. (1941). The story of variable stars: León Campbell and Luigi Jacchia. Philadelphia: The Blakiston Company.
Chicago Style CitationCampbell, León, and Luigi G. Jacchia. The Story of Variable Stars: León Campbell and Luigi Jacchia. Philadelphia: The Blakiston Company, 1941.
MLA CitationCampbell, León, and Luigi G. Jacchia. The Story of Variable Stars: León Campbell and Luigi Jacchia. Philadelphia: The Blakiston Company, 1941.