Gaya APA
Waddell, J, J., Dobrowolski, J, A. (1993).
Concrete construction handbook (3rd ed.).
United States of Amerika:
McGraw Hill.
Gaya MLA
Waddell, Joseph, J.., Dobrowolski, Joseph, A..
"Concrete construction handbook".
3rd ed.
United States of Amerika:
McGraw Hill,
1993.
Text.