Gaya APA

Stairway Afun and Easy English Book For Grade IV of Elementary Schools. (2015). Solo: Tiga Serangkai Pustaka Mandiri.

Gaya MLA

Stairway Afun and Easy English Book For Grade IV of Elementary Schools. Cetakan 1.jilid 4. Solo: Tiga Serangkai Pustaka Mandiri, 2015. Text.