@book{91649,
	author = {Roni Hidayat Ridwan, },
	title = {Sektor perlombongan},
	publisher = {Penerbitan Hartamas , },
	year = {2006},
	series = {Siri memacu ekonomi negara},
	address = {Kuala Lumpur : },
	note = {Includes glossary ; Includes questions}
}