Παραπομπή σε μορφή APA (7η εκδ.)

Nickles, J., & Siedl, H. (2004). Co-ordination of social security in the Council of Europe: Short guide. Council of Europe.

Παραπομπή σε μορφή Chicago (17η εκδ.)

Nickles, Jason, και Helmut Siedl. Co-ordination of Social Security in the Council of Europe: Short Guide. Strasbourg: Council of Europe, 2004.

Παραπομπή σε μορφή MLA (9th εκδ.)

Nickles, Jason, και Helmut Siedl. Co-ordination of Social Security in the Council of Europe: Short Guide. Council of Europe, 2004.