APA Style
Bell, Frederick W., Popov, Stale.. ().
Swarthy Angja. .
:
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Chicago Style
Bell, Frederick W., Popov, Stale..
Swarthy Angja..
:
,
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.
MLA Style
Bell, Frederick W., Popov, Stale..
Swarthy Angja..
:
,
.
.
Turabian Style
Bell, Frederick W., Popov, Stale..
Swarthy Angja..
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,
.
.