APA

Ropes M. W., . (1976). Systemic lupus erythematosus. Cambridge, Mass: Harvard University Press.

Chicago

Ropes Marian Wilkins, . 1976. Systemic lupus erythematosus. Cambridge, Mass: Harvard University Press.

Harvard

Ropes M. W., . (1976). Systemic lupus erythematosus. Cambridge, Mass: Harvard University Press.

MLA

Ropes Marian Wilkins, . Systemic lupus erythematosus. Cambridge, Mass: Harvard University Press. 1976.