Gaya APA
Smith, M, , R. et al (2001).
Aggregates: Sand,Gravel And Crushed Rock Aggregates For Construction Purposes .
London:
The Geological Society.
Gaya MLA
Smith, M., , R.. et al.
"Aggregates: Sand,Gravel And Crushed Rock Aggregates For Construction Purposes".
London:
The Geological Society,
2001.
Text.