APA Style

Leo, Sutanto. (2013). A challenging book to practice teaching in english . Yogyakarta: Andi.

Chicago Style

Leo, Sutanto. A challenging book to practice teaching in english. Yogyakarta: Andi, 2013. Text.

MLA Style

Leo, Sutanto. A challenging book to practice teaching in english. Yogyakarta: Andi, 2013. Text.

Turabian Style

Leo, Sutanto. A challenging book to practice teaching in english. Yogyakarta: Andi, 2013. Print.