Duckworth, Angela, author
Gramedia Pustaka Utama, 2018
Buku Teks
Powell, Gary N.
Sage Publications, 1988
Buku Teks
Kanter, Rosabeth Moss
Basic Books, 1993
Buku Teks
Murakami, Haruki, 1949-, author
Alfred A. Knopf, 2017
Buku Teks
Equal Opportunities Commission
Her Majesty's Stationery Office, 1987
Buku Referensi