Gaya APA
Grigg, A.O.. (1979).
An opinion survey of the Yorkshire Dales rail service in 1977 .
:
TRRL.
Gaya Chicago
Grigg, A.O..
An opinion survey of the Yorkshire Dales rail service in 1977.
:
TRRL,
1979.
Chart.
Gaya MLA
Grigg, A.O..
An opinion survey of the Yorkshire Dales rail service in 1977.
:
TRRL,
1979.
Chart.
Gaya Turabian
Grigg, A.O..
An opinion survey of the Yorkshire Dales rail service in 1977.
:
TRRL,
1979.
Chart.