Gaya APA
Th.M.Sudarwati, ., Grace, E. (2007).
Look Ahead An English Course : For Senior High School Student Year XII (1).
pekanbaru:
Erlangga.
Gaya MLA
Th.M.Sudarwati, ., Grace, Eudia.
"Look Ahead An English Course : For Senior High School Student Year XII".
1
pekanbaru:
Erlangga,
2007.
Text.