APA Style
Sky and telescope : April 2015. (2015).
:
.
Chicago Style
Sky and telescope : April 2015.
.
:
,
2015.
Magazine.
MLA Style
Sky and telescope : April 2015.
.
:
,
2015.
Magazine.
Turabian Style
Sky and telescope : April 2015.
:
,
2015.
Magazine.