APA Style

2003, B, , C, I, H, B, P, U. (2011). Investigation of Period Variation for Three RS CVn Type Binary Stars Systems . : .

MLA Style

2003, By, , Cheman, Ibrahim, Hussan,, B.Sc., Physics-Salahaddin, University-Erbil. "Investigation of Period Variation for Three RS CVn Type Binary Stars Systems". : , 2011. Master.