Kepala sama hitam, isi kepala dapat berwarna-warna: studi kasus keragaman interpretasi kebudayaan organisasi perusahaan PT. Garuda Indonesia (Persero) Tbk di antara divisi-divisi perusahaan = "Kepala Sama Hitam, Isi Kepala dapat Berwarna-warna": case study of diversity of interpretation PT. Garuda Indonesia (Persero) Tbk's corporate culture among its corporate division