APA

Couper H., Henbest N., . (2000). Space encyclopedia. London: Dorling Kindersley.

Chicago

Couper Heather, Henbest Nigel, . 2000. Space encyclopedia. London: Dorling Kindersley.

Harvard

Couper H., Henbest N., . (2000). Space encyclopedia. London: Dorling Kindersley.

MLA

Couper Heather, Henbest Nigel, . Space encyclopedia. London: Dorling Kindersley. 2000.