APA (7. basım) Alıntı

Grobstein, T. (1991). Mining the asteroids. NASA Lewis Research Center.

Chicago Style (17. basım) Atıf

Grobstein, Toni. Mining the Asteroids. Ceveland, Ohio: NASA Lewis Research Center, 1991.

MLA (9th ed.) Atıf

Grobstein, Toni. Mining the Asteroids. NASA Lewis Research Center, 1991.