[Analisa pengaruh pengumuman merger dan akuisisi terhadap abnormal return saham dan evaluasi kinerja perusahaan pengakuisisi pasca merger dan akuisisi = Analysis effect to merger and acquisition announcements about abnormal return and performance evaluation post acquirer mergers and acquisitions;Analisa pengaruh pengumuman merger dan akuisisi terhadap abnormal return saham dan evaluasi kinerja perusahaan pengakuisisi pasca merger dan akuisisi = Analysis effect to merger and acquisition announcements about abnormal return and performance evaluation post acquirer mergers and acquisitions / Demak Novalia Elisabeth, Analisa pengaruh pengumuman merger dan akuisisi terhadap abnormal return saham dan evaluasi kinerja perusahaan pengakuisisi pasca merger dan akuisisi = Analysis effect to merger and acquisition announcements about abnormal return and performance evaluation post acquirer mergers and acquisitions]