@book{2006-stallman ,note={URL: {\tt http://www.gnu.org/software/make/manual/make.pdf}. Note: Last updated 1 April 2006 for GNU {\tt make} version 3.81} ,title={{The GNU Make Manual, edition: 0.70}} ,booktitle={{The GNU Make Manual, edition: 0.70}} ,author={Richard Stallman and Roland McGrath} ,publisher={Free Software Foundation} ,address={Boston} ,year={2006} }