APA
(1989). NCERT Ganitham.Part.1. : State Institute Of Language Thiruvananthapuram.
Chicago
1989. NCERT Ganitham.Part.1. : State Institute Of Language Thiruvananthapuram.
Harvard
(1989). NCERT Ganitham.Part.1. : State Institute Of Language Thiruvananthapuram.
MLA
NCERT Ganitham.Part.1. : State Institute Of Language Thiruvananthapuram. 1989.