Invitional Expert Seminar Lesvos, Commission of the European Communities. Directorate General, & Πανεπιστήμιο Αιγαίου. (1992). Global environmental labelling: Invitational expert seminar, Lesvos, Greece September 24-25, 1991. University of the Aegean, Department of Environmental Studies.
Παραπομπή σε μορφή Chicago (17η εκδ.)Invitional Expert Seminar Lesvos, Commission of the European Communities. Directorate General, και Πανεπιστήμιο Αιγαίου. Global Environmental Labelling: Invitational Expert Seminar, Lesvos, Greece September 24-25, 1991. Mytilene: University of the Aegean, Department of Environmental Studies, 1992.
Παραπομπή σε μορφή MLA (9th εκδ.)Invitional Expert Seminar Lesvos, et al. Global Environmental Labelling: Invitational Expert Seminar, Lesvos, Greece September 24-25, 1991. University of the Aegean, Department of Environmental Studies, 1992.