APA (7th ed.) Citation

Project STAR & Sadler, P. M. (1989). Twenty-one activities concerning where we are in space and time. Harvard-Smithsonian Centre for Astrophysics.

Chicago Style (17th ed.) Citation

Project STAR and Philips M. Sadler. Twenty-one Activities Concerning Where We Are in Space and Time. Cambridge, MA: Harvard-Smithsonian Centre for Astrophysics, 1989.

MLA (9th ed.) Citation

Project STAR and Philips M. Sadler. Twenty-one Activities Concerning Where We Are in Space and Time. Harvard-Smithsonian Centre for Astrophysics, 1989.