Gaya APA
graham, M. (2015).
Boom! English grammar made easy : a simple and easy guide for english learner (cet 1).
Jakarta:
Erlangga.
Gaya MLA
graham, Mark.
"Boom! English grammar made easy : a simple and easy guide for english learner".
cet 1
Jakarta:
Erlangga,
2015.
Text.