Gaya APA

Dewi, I, K. (2015). Stairway A Fun and Easy English Book for Grade 1 . Solo: PT tiga seragkai Pusaka Mandiri.

Gaya MLA

Dewi, Ida, Kusuma. "Stairway A Fun and Easy English Book for Grade 1". Solo: PT tiga seragkai Pusaka Mandiri, 2015. Text.