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Reference "2009( 1 1) and 2009.2 (2)" 1 1 is it a question of1? How to write this master's thesis?
1 1 refers to the period, for example, February 2009, Volume 13 (5), No.5, February 2009.

Volume is generally how many volumes a journal has since it was founded, which can be published 13. Founded in 1996, it is now 13. Five issues means: if the periodical is a monthly magazine, there are 12 issues in a year and 12 months in a year. There are 24 issues in bimonthly. There are six issues in bimonthly. I see