Belawati H. Widjaja
Construction of Trustworthy Software Using Formal Methods First Year Research Report
Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Indonesia, 1998
 UI - Laporan Penelitian
McNeill, Patrick
Research methods
Routledge, 1990
 Buku Teks
White, Theresa L.
Research methods
Wadsworth and Cengage Learning, 2013
 Buku Teks
Nunnally, Stephen. W., 1927-
Construction methods and management
Prentice-Hall, 1993
 Buku Teks
Peurifoy, Robert Leroy
Construction planning, equipment, and methods
McGraw-Hill, 2006
 Buku Teks