Gaya APA
Sholikhah, I, M. et al (1989).
The Heinemann English Grammar: An Intermediate Reference And Practice Book-with Answer Key .
Oxford:
Heinemann International.
Gaya MLA
Sholikhah, Ika, Maratus. et al.
"The Heinemann English Grammar: An Intermediate Reference And Practice Book-with Answer Key".
Oxford:
Heinemann International,
1989.
Text.