APA Style
Asimov, Isaac. (1977).
The collapsing universe (1st ed).
United State of America:
Walker Publishing.
Chicago Style
Asimov, Isaac.
The collapsing universe.
1st ed
United State of America:
Walker Publishing,
1977.
Report.
MLA Style
Asimov, Isaac.
The collapsing universe.
1st ed
United State of America:
Walker Publishing,
1977.
Report.
Turabian Style
Asimov, Isaac.
The collapsing universe.
1st ed
United State of America:
Walker Publishing,
1977.
Report.