Gaya APA
Rasper, L. (1975).
The Bucket Whell Excavator : Development Design Application Vol. 1. (1st).
Germany:
Trans Tech Publications.
Gaya MLA
Rasper, Ludwig..
"The Bucket Whell Excavator : Development Design Application Vol. 1.".
1st
Germany:
Trans Tech Publications,
1975.
Text.