Gaya APA

Riske, K, B. (2015). Llewellyn's Complete Book of Astrology : The Easy way to learn astrology (Cet.7). USA: Llewellyn Publication.

Gaya MLA

Riske, Kris, Brandt. "Llewellyn's Complete Book of Astrology : The Easy way to learn astrology". Cet.7 USA: Llewellyn Publication, 2015. Text.