Penggayaan APA
Ballance, Hellen, Dennis. (1969).
Mining and drilling .
London:
Ginn & Company Ltd..
Chicago Style
Ballance, Hellen, Dennis.
Mining and drilling.
London:
Ginn & Company Ltd.,
1969.
Text.
MLA Style
Ballance, Hellen, Dennis.
Mining and drilling.
London:
Ginn & Company Ltd.,
1969.
Text.
Turabian Style
Ballance, Hellen, Dennis.
Mining and drilling.
London:
Ginn & Company Ltd.,
1969.
Print.