Heijbroek, A.M.A., author
Rabobank International Group, 1995
Buku Teks
Dhanendra Rizki Martifauzi, author
Fakultas Ekonomi dan Bisnis Universitas Indonesia, 2020
UI - Makalah dan Kertas Kerja
Sahgal, Nayantara
Alfred A. Knopf, 1954
Buku Teks
Felix, Jiri
Octopus Books, 1975
Buku Referensi
Scott, Erik R., author
Oxford University Press, 2016
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