Ford, H. C., Jacoby, G. H., & Jenner, D. C. (1977). Planetary nebulae in local group galaxies IV: Identifications, positions and radial velocities of nebulae in NGC 147 and NGC 185. University of California.
Chicago Style (17th ed.) CitationFord, Holland C., George H. Jacoby, and David C. Jenner. Planetary Nebulae in Local Group Galaxies IV: Identifications, Positions and Radial Velocities of Nebulae in NGC 147 and NGC 185. Los Angeles: University of California, 1977.
MLA (9th ed.) CitationFord, Holland C., et al. Planetary Nebulae in Local Group Galaxies IV: Identifications, Positions and Radial Velocities of Nebulae in NGC 147 and NGC 185. University of California, 1977.
Warning: These citations may not always be 100% accurate.