APA (7th ed.) Citation

Ford, H. C., Jenner, D. C., & Epps, H. W. (1973). Planetary nebulae in local-group galaxies I: Identifications in NGC 185, NGC 205 and NGC 221. University of California.

Chicago Style (17th ed.) Citation

Ford, Holland C., David C. Jenner, and Harland W. Epps. Planetary Nebulae in Local-group Galaxies I: Identifications in NGC 185, NGC 205 and NGC 221. Los Angeles: University of California, 1973.

MLA (9th ed.) Citation

Ford, Holland C., et al. Planetary Nebulae in Local-group Galaxies I: Identifications in NGC 185, NGC 205 and NGC 221. University of California, 1973.