Gaya APA

Spring. (2010). Yogyakarta: Sheila.

Gaya Chicago

Spring. . Yogyakarta: Sheila, 2010. Text.

Gaya MLA

Spring. . Yogyakarta: Sheila, 2010. Text.

Gaya Turabian

Spring. Yogyakarta: Sheila, 2010. Print.