Gaya APA
Gordon, K, B., Ruderman, E, M. (2005).
Psoriasis and Psoriatic Arthritis (1st ed.).
Berlin, Heidelberg:
Springer.
Gaya MLA
Gordon, Kenneth, B.., Ruderman, Eric, M..
"Psoriasis and Psoriatic Arthritis".
1st ed.
Berlin, Heidelberg:
Springer,
2005.
E Book.