Gaya APA

Stairway A fun and Easy English Book for Grade VI of Elementary School. (2015). Solo: Tiga Serangkai Pustaka Mandiri.

Gaya MLA

Stairway A fun and Easy English Book for Grade VI of Elementary School. Cetakan 1.jilid 6. Solo: Tiga Serangkai Pustaka Mandiri, 2015. Text.