APA (7th ed.) Citation

JW, W., & HO, P. (1969). Erythema perstans. The British journal of dermatology, 81(9), 641. https://doi.org/10.1111/j.1365-2133.1969.tb16202.x

Chicago Style (17th ed.) Citation

JW, White, and Perry HO. "Erythema Perstans." The British Journal of Dermatology 81, no. 9 (1969): 641. https://doi.org/10.1111/j.1365-2133.1969.tb16202.x.

MLA (9th ed.) Citation

JW, White, and Perry HO. "Erythema Perstans." The British Journal of Dermatology, vol. 81, no. 9, 1969, p. 641, https://doi.org/10.1111/j.1365-2133.1969.tb16202.x.