APA
Luginbuhl C. B., Skiff B. A., . (1990). Observing handbook and catalogue of deep-sky objects. Cambridge: Cambridge University Press.
Chicago
Luginbuhl Christian B, Skiff Brian A, . 1990. Observing handbook and catalogue of deep-sky objects. Cambridge: Cambridge University Press.
Harvard
Luginbuhl C. B., Skiff B. A., . (1990). Observing handbook and catalogue of deep-sky objects. Cambridge: Cambridge University Press.
MLA
Luginbuhl Christian B, Skiff Brian A, . Observing handbook and catalogue of deep-sky objects. Cambridge: Cambridge University Press. 1990.