APA Citation

Perek, L., & Kohoutek, L. (1967). Catalogue of galactic planetary nebulae. Prague: Academia.

Chicago Style Citation

Perek, Lubos?, and Lubos? Kohoutek. Catalogue of Galactic Planetary Nebulae. Prague: Academia, 1967.

MLA Citation

Perek, Lubos?, and Lubos? Kohoutek. Catalogue of Galactic Planetary Nebulae. Prague: Academia, 1967.

Warning: These citations may not always be 100% accurate.