Gaya APA
Allen, R.T.L.. (1987).
Cements and aggregates .
:
Blackie & Sons.
Gaya Chicago
Allen, R.T.L..
Cements and aggregates.
:
Blackie & Sons,
1987.
Text.
Gaya MLA
Allen, R.T.L..
Cements and aggregates.
:
Blackie & Sons,
1987.
Text.
Gaya Turabian
Allen, R.T.L..
Cements and aggregates.
:
Blackie & Sons,
1987.
Print.