APA (7th ed.) Citation

Tegmark, M., & Bostrom, N. (2005). Astrophysics: Is a doomsday catastrophe likely?

Chicago Style (17th ed.) Citation

Tegmark, M., and N. Bostrom. Astrophysics: Is a Doomsday Catastrophe Likely? 2005.

MLA (9th ed.) Citation

Tegmark, M., and N. Bostrom. Astrophysics: Is a Doomsday Catastrophe Likely? 2005.

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