Zaidan, George C.
The John Hopkins University Press, 1971
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Triyunita Utami
Fakultas Ekonomi dan Bisnis Universitas Indonesia, 2018
UI - Skripsi Membership
Carl I. Fertman, Diane D. Allensworth
Jossey-Bass , 2017
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Atikah Adyas, Yusuf Kristanto, Ede Surya Darmawan, Ali Ghufron Mukti
UI Publishing, 2019
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Azzi, Corry F.
Lexington Books, 1973
Buku Teks