APA

Woolard S., . (2000). Butterflies. London: Dorling Kindersley Book.

Chicago

Woolard Sarah, . 2000. Butterflies. London: Dorling Kindersley Book.

Harvard

Woolard S., . (2000). Butterflies. London: Dorling Kindersley Book.

MLA

Woolard Sarah, . Butterflies. London: Dorling Kindersley Book. 2000.