Styl cytowania APA

Siemers, J. P., & Siemers-Hidma, E. H. (1981). European integration: Select international bibliography of theses and dissertations, 1957 - 1980 = Europäische Integration. Nijhoff.

Styl cytowania Chicago

Siemers, J. P., i E. H. Siemers-Hidma. European Integration: Select International Bibliography of Theses and Dissertations, 1957 - 1980 = Europäische Integration. The Hague [u.a.]: Nijhoff, 1981.

Styl cytowania MLA

Siemers, J. P., i E. H. Siemers-Hidma. European Integration: Select International Bibliography of Theses and Dissertations, 1957 - 1980 = Europäische Integration. Nijhoff, 1981.