Gaya APA

heijde, M, D, D, D, V, D. (2004). Ankylosing Spondylitis . [s.i.]: health press.

Gaya MLA

heijde, Maxime, Dougados, Dan, Desiree, Van, Der. "Ankylosing Spondylitis ". [s.i.]: health press, 2004. Text.