Robinson, Colin
Nelson, 1971
Buku Teks
edited by Elizabeth Marting
American Management Association , 1957
Buku Teks
Hanke, John E.
Pearson - Prentice Hall, 2009
Buku Teks
Annisa Cipta Nabila
Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Indonesia, 2022
UI - Skripsi (Membership)
Hanke, John E.
Prentice Halls, 2001
Buku Teks