APA

Kirkeby P., Maderuelo J., .Per Kirkeby. : CDAN.

Chicago

Kirkeby Per, Maderuelo Javier, .Per Kirkeby. : CDAN.

Harvard

Kirkeby P., Maderuelo J., .Per Kirkeby. : CDAN.

MLA

Kirkeby Per, Maderuelo Javier, .: CDAN. .