Hunter, Mel.
Doubleday, 1960
Buku Teks
Dyckman, Thomas R., author
Macmillan, 1969
Buku Teks
Luthfan Haqi, author
Fakultas Ilmu Pengetahuan dan Budaya Universitas Indonesia, 2023
UI - Tugas Akhir
Glover, John D.
Harvard University, Division of Research, Graduate School of Business Administration, 1960
Buku Teks
Macmillan, Norman, author
Cahaya Langit, 2003
Buku Teks