Cita APA (7th ed.)

ebrary, Inc, & Kerkhof, P. C. M. v. d. (2003). Textbook of psoriasis (2nd ed.). Blackwell.

Cita Chicago (17th ed.)

ebrary, Inc, i Petrus Cornelis Maria van de Kerkhof. Textbook of Psoriasis. 2nd ed. Malden, Mass.: Blackwell, 2003.

Cita MLA (9th ed.)

ebrary, Inc, i Petrus Cornelis Maria van de Kerkhof. Textbook of Psoriasis. 2nd ed. Blackwell, 2003.