APA (7th ed.) Citation

Usher, R., Afzal, S. M., & Collins, T. 20 A young farmer with a suspicious vesicular lesion. Elsevier.

Chicago Style (17th ed.) Citation

Usher, Robert, Samira Mohd Afzal, and Tom Collins. 20 A Young Farmer with a Suspicious Vesicular Lesion. Elsevier.

MLA (9th ed.) Citation

Usher, Robert, et al. 20 A Young Farmer with a Suspicious Vesicular Lesion. Elsevier.