APA (7th ed.) Citation

Ward, Evans, & Tripp. (1990). Your diet. Harrap Pubs.

Chicago Style (17th ed.) Citation

Ward, Evans, and Tripp. Your Diet. Bromley: Harrap Pubs, 1990.

MLA (8th ed.) Citation

Ward, et al. Your Diet. Harrap Pubs, 1990.

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