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Hidayat, Ahmad Afif (2022) Strategi Marketing Public Relations PT. Airlangga Global Traveling dalam Mempertahankan Eksistensi Perusahaan di Masa Pandemi Covid-19. (Public Relations Marketing Strategy PT. Airlangga Global Traveling in Maintaining The Existence of The Company in The Time of The Covid-19 Pandemic). Undergraduate thesis, Universitas 17 Agustus 1945 Surabaya.