Gaya APA
Petts, , R. (1982).
PRACTICAL GUIDELINES FOR RURAL ROAD MAINTENANCE: Vol I Maintenance of Roadside Areas and Drainage .
Germany:
Piarc.
Gaya MLA
Petts, , R.C..
"PRACTICAL GUIDELINES FOR RURAL ROAD MAINTENANCE: Vol I Maintenance of Roadside Areas and Drainage".
Germany:
Piarc,
1982.
Text.