APA Style
Ibrahim, C. (2011).
Investigation of Period Variation for three RS CVn Type Binary Stars Systems : master .
Erbil:
Salahaddin Yniversity.
MLA Style
Ibrahim, Cheman.
"Investigation of Period Variation for three RS CVn Type Binary Stars Systems : master".
Erbil:
Salahaddin Yniversity,
2011.
Text.