Gaya APA
Leo. (2013).
A challenging book to practice teaching in english .
Yogyakarta:
Andi.
Gaya Chicago
Leo.
A challenging book to practice teaching in english.
Yogyakarta:
Andi,
2013.
Text.
Gaya MLA
Leo.
A challenging book to practice teaching in english.
Yogyakarta:
Andi,
2013.
Text.
Gaya Turabian
Leo.
A challenging book to practice teaching in english.
Yogyakarta:
Andi,
2013.
Print.