Gaya APA
Franciss, F.O.. (1994).
WEAK ROCK TUNNELLING .
Netherland:
AA Balkema Publishers.
Gaya Chicago
Franciss, F.O..
WEAK ROCK TUNNELLING.
Netherland:
AA Balkema Publishers,
1994.
Text.
Gaya MLA
Franciss, F.O..
WEAK ROCK TUNNELLING.
Netherland:
AA Balkema Publishers,
1994.
Text.
Gaya Turabian
Franciss, F.O..
WEAK ROCK TUNNELLING.
Netherland:
AA Balkema Publishers,
1994.
Print.