APA

,, . (1990). European interim agreement on social security schemes relating to old age , invalidity and survivors and protocol thereto. Strasbourg: Council of Europe.

Chicago

,, . 1990. European interim agreement on social security schemes relating to old age , invalidity and survivors and protocol thereto. Strasbourg: Council of Europe.

Harvard

,, . (1990). European interim agreement on social security schemes relating to old age , invalidity and survivors and protocol thereto. Strasbourg: Council of Europe.

MLA

,, . European interim agreement on social security schemes relating to old age , invalidity and survivors and protocol thereto. Strasbourg: Council of Europe. 1990.