APA
(2006). Easy English 4 : Plain English. : SISO Publishers Pattam,,Thiruvananthapuram.
Chicago
2006. Easy English 4 : Plain English. : SISO Publishers Pattam,,Thiruvananthapuram.
Harvard
(2006). Easy English 4 : Plain English. : SISO Publishers Pattam,,Thiruvananthapuram.
MLA
Easy English 4 : Plain English. : SISO Publishers Pattam,,Thiruvananthapuram. 2006.