APA
(2000). Ms-Office 97. : Educational Supplies Dept. Thiruvananthapuram.
Chicago
2000. Ms-Office 97. : Educational Supplies Dept. Thiruvananthapuram.
Harvard
(2000). Ms-Office 97. : Educational Supplies Dept. Thiruvananthapuram.
MLA
Ms-Office 97. : Educational Supplies Dept. Thiruvananthapuram. 2000.