APA (7th ed.) Citation

Bilal, E. (1999). The Nikopol trilogy (English language ed.). Humanoids.

Chicago Style (17th ed.) Citation

Bilal, Enki. The Nikopol Trilogy. English language ed. Los Angeles, Calif: Humanoids, 1999.

MLA (9th ed.) Citation

Bilal, Enki. The Nikopol Trilogy. English language ed. Humanoids, 1999.