Gaya APA
Grigg, A.O.. (1977).
An opinion survey of the Yorkshire Dales rail service in 1975 .
:
TRRL.
Gaya Chicago
Grigg, A.O..
An opinion survey of the Yorkshire Dales rail service in 1975.
:
TRRL,
1977.
Chart.
Gaya MLA
Grigg, A.O..
An opinion survey of the Yorkshire Dales rail service in 1975.
:
TRRL,
1977.
Chart.
Gaya Turabian
Grigg, A.O..
An opinion survey of the Yorkshire Dales rail service in 1975.
:
TRRL,
1977.
Chart.