Preston, Antony
London: Chancellor, 1999,
Buku Referensi
Dalamagkidis, Konstantinos, author
[, Springer], 2012
eBooks
Jahn, Robert G.
McGraw-Hill Book, , 1968"
Buku Teks
Astrid Kartika, author
Fakultas Ekonomi dan Bisnis Universitas Indonesia, 2019
UI - Tesis Membership
Casamassa, Jack V.
McGraw-Hill, 1965
Buku Teks