Gaya APA

JAMES, B, R. (2020). COSMIC PINWHEELS: SPIRAL GALAXIES AND THE UNIVERSE . : World Scientific Publishing Co.

Gaya MLA

JAMES, BUTA, RONALD. "COSMIC PINWHEELS: SPIRAL GALAXIES AND THE UNIVERSE". : World Scientific Publishing Co, 2020. S2-Pendidikan Bahasa Arab.