Gaya APA

Cakrawala Astronomi / Muhammad Ramdhan Adi. (). : Jakarta : PT. Sarana Panca Karya Nusa, 2009.

Gaya MLA

Cakrawala Astronomi / Muhammad Ramdhan Adi. 1. : Jakarta : PT. Sarana Panca Karya Nusa, 2009, . .