Gaya APA
Holroyd, Joyce. (1970).
Area control of traffic signals in Glasgow .
:
s.n..
Gaya Chicago
Holroyd, Joyce.
Area control of traffic signals in Glasgow.
:
s.n.,
1970.
Filmstrip.
Gaya MLA
Holroyd, Joyce.
Area control of traffic signals in Glasgow.
:
s.n.,
1970.
Filmstrip.
Gaya Turabian
Holroyd, Joyce.
Area control of traffic signals in Glasgow.
:
s.n.,
1970.
Filmstrip.