APA (7th ed.) Citation

Colver, Evans, & Tripp. (1990). Your skin. Harrap Pubs.

Chicago Style (17th ed.) Citation

Colver, Evans, and Tripp. Your Skin. Bromley: Harrap Pubs, 1990.

MLA (8th ed.) Citation

Colver, et al. Your Skin. Harrap Pubs, 1990.

Warning: These citations may not always be 100% accurate.