APA Style
Sagan, C.
().
PALE BLUE DOT, A Vision of the human future in space
(
11)
.
:
BALLANTINE PUBLICATION, N.YORK.
MLA Style
Sagan, Carl.
"PALE BLUE DOT, A Vision of the human future in space".
11
:
BALLANTINE PUBLICATION, N.YORK,
.
Text.