Cita APA (7th ed.)

OXLADE CHRIS. (2019). GRAVITY (2011 Ed.). HEINEMANN LIBRARY.

Cita Chicago (17th ed.)

OXLADE CHRIS. GRAVITY. 2011 Ed. MINNESOTA: HEINEMANN LIBRARY, 2019.

Cita MLA (9th ed.)

OXLADE CHRIS. GRAVITY. 2011 Ed. HEINEMANN LIBRARY, 2019.