APA Style
Beck, Roger B.. (2012).
World History .
:
Houghton Mifflin Company.
Chicago Style
Beck, Roger B..
World History.
:
Houghton Mifflin Company,
2012.
Text.
MLA Style
Beck, Roger B..
World History.
:
Houghton Mifflin Company,
2012.
Text.
Turabian Style
Beck, Roger B..
World History.
:
Houghton Mifflin Company,
2012.
Print.