Riemer, Jeffrey W., author
Hard hats: the work world of construction workers
Sage, 1979
 Buku Teks
Muhammad Anis, author
Kinerja Perusahaan dengan Budaya Work Hard/Play Hard = Corporate Performance with Work Hard/Play Hard Culture
Fakultas Ilmu Sosial dan Ilmu Politik Universitas Indonesia, 2014
 UI - Skripsi (Membership)
Murakami, Haruki, 1949-, author
Hard-boi led wonderland and the end of the world: a novel
Vintage International, 1991
 Buku Teks
Murakami, Haruki, 1949-, author
Hard-boiled wonderland and the end of the world : a novel
Vintage Books, 1993
 Buku Teks
Epstein, Irwin, author
Social workers at work
F.E.Peacock Publishers, Inc., 1977
 Buku Teks
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