Gaya APA
Bickel, John O.. (1968).
Tunnel Engineering .
:
McGraw Hill.
Gaya Chicago
Bickel, John O..
Tunnel Engineering.
:
McGraw Hill,
1968.
Globe.
Gaya MLA
Bickel, John O..
Tunnel Engineering.
:
McGraw Hill,
1968.
Globe.
Gaya Turabian
Bickel, John O..
Tunnel Engineering.
:
McGraw Hill,
1968.
Globe.