APA (7th ed.) Citation

Klass, D. B. (2014). Approaching the end of time. [s.n.].

Chicago Style (17th ed.) Citation

Klass, David Brian. Approaching the End of Time. [S.l.]: [s.n.], 2014.

MLA (9th ed.) Citation

Klass, David Brian. Approaching the End of Time. [s.n.], 2014.

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