APA (7th ed.) Citation

Zabel, P. (2019). Bio-regenerative Life Support Systems for Human Space Exploration.

Chicago Style (17th ed.) Citation

Zabel, Paul. Bio-regenerative Life Support Systems for Human Space Exploration. 2019.

MLA (9th ed.) Citation

Zabel, Paul. Bio-regenerative Life Support Systems for Human Space Exploration. 2019.

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