Cita APA

Yell, J., Wojnarowska, F., Allen, J., & Burge, S. (1993). Bullous systemic lupus erythematosus--a variable disease.

Citación estilo Chicago

Yell, J., F. Wojnarowska, J. Allen, and S. Burge. Bullous Systemic Lupus Erythematosus--a Variable Disease. 1993.

Cita MLA

Yell, J., et al. Bullous Systemic Lupus Erythematosus--a Variable Disease. 1993.