APA ציטוט

Terzian, Y., & Bilson, E. (1997). Carl Sagan's universe. Uty.Press.

Chicago Edition Citation

Terzian, Yervant, and Elizabeth Bilson. Carl Sagan's Universe. Cambridge: Uty.Press, 1997.

ציטוט MLA

Terzian, Yervant, and Elizabeth Bilson. Carl Sagan's Universe. Uty.Press, 1997.