Penfold, John
Trentham Books, 1988
Buku Teks
Gillespie, Sheena, author
Scott, Foresman and Company, 1986
Buku Teks
Radojcic, Dejan, author
Springer Cham, 2019
eBooks
Alusi Freeta Ratu Mondru, author
2016
UI - Tesis (Membership)
Fajar Gumilang Kosasih, author
Fakultas Ekonomi dan Bisnis Universitas Indonesia, 2018
UI - Tesis (Membership)