Gaya APA
Gray, L., Edwars, L.
(2013).
English Elevator International Teacher's Book 3
.
Jakarta:
Asta Ilmu Sukses.
Gaya MLA
Gray, Leanne., Edwars, Linda.
"English Elevator International Teacher's Book 3".
Jakarta:
Asta Ilmu Sukses,
2013.
Text.