APA

Parker D., Parker J., . (2007). Astrology. London: Dorling Kindersley.

Chicago

Parker Derek, Parker Julia, . 2007. Astrology. London: Dorling Kindersley.

Harvard

Parker D., Parker J., . (2007). Astrology. London: Dorling Kindersley.

MLA

Parker Derek, Parker Julia, . Astrology. London: Dorling Kindersley. 2007.