Gaya APA
Frith, B.A.. (1991).
Goods vehicle surveys at four WIM pre selection sites (1990/1991 .
:
TRRL.
Gaya Chicago
Frith, B.A..
Goods vehicle surveys at four WIM pre selection sites (1990/1991.
:
TRRL,
1991.
Chart.
Gaya MLA
Frith, B.A..
Goods vehicle surveys at four WIM pre selection sites (1990/1991.
:
TRRL,
1991.
Chart.
Gaya Turabian
Frith, B.A..
Goods vehicle surveys at four WIM pre selection sites (1990/1991.
:
TRRL,
1991.
Chart.