APA
Blanpain R., van Opstal M., . (1999). Social security law : Suppl. 29, Case Law (8), codex (5). The Hague, London, Boston: Klumer Law international P.O. Box 322 3300 AH Dordrecht.
Chicago
Blanpain R, van Opstal M, . 1999. Social security law : Suppl. 29, Case Law (8), codex (5). The Hague, London, Boston: Klumer Law international P.O. Box 322 3300 AH Dordrecht.
Harvard
Blanpain R., van Opstal M., . (1999). Social security law : Suppl. 29, Case Law (8), codex (5). The Hague, London, Boston: Klumer Law international P.O. Box 322 3300 AH Dordrecht.
MLA
Blanpain R, van Opstal M, . Social security law : Suppl. 29, Case Law (8), codex (5). The Hague, London, Boston: Klumer Law international P.O. Box 322 3300 AH Dordrecht. 1999.