Gaya APA
Pennington, Robert R.. (1976).
European patents at the crossroads .
London:
.
Gaya Chicago
Pennington, Robert R..
European patents at the crossroads.
London:
,
1976.
Text.
Gaya MLA
Pennington, Robert R..
European patents at the crossroads.
London:
,
1976.
Text.
Gaya Turabian
Pennington, Robert R..
European patents at the crossroads.
London:
,
1976.
Print.