Gaya APA
Marshall, W. (NULL).
Solution of problems in structures a problem-based textbook .
[s.l]::
[s.l]: Pitman Publishing; 1971.
Gaya MLA
Marshall, W.T..
"Solution of problems in structures a problem-based textbook".
[s.l]::
[s.l]: Pitman Publishing; 1971,
NULL.
Text.