APA (7th ed.) Citation

Cashell, G. T. W., Durran, I. M., & MacLellan, A. V. (1980). Handbook of orthoptic principles (4th ed.). Churchill Livingstone.

Chicago Style (17th ed.) Citation

Cashell, G. T. Willoughby, Isobel M. Durran, and A. V. MacLellan. Handbook of Orthoptic Principles. 4th ed. Edinburgh ; New York: Churchill Livingstone, 1980.

MLA (9th ed.) Citation

Cashell, G. T. Willoughby, et al. Handbook of Orthoptic Principles. 4th ed. Churchill Livingstone, 1980.