Gaya APA
Downie, M. (2019).
English Elevator International Intermediate Second Edition (Cet. 1).
Indonesia:
Asta Ilmu Sukses.
Gaya MLA
Downie, Michael.
"English Elevator International Intermediate Second Edition".
Cet. 1
Indonesia:
Asta Ilmu Sukses,
2019.
Text.