APA
Akai K Ed, International symposium on weak rock (1981 : Tokyo), Hayashi M Ed & Nishimatsu Y Ed. (1981). Proceeding on weak rock: soft, fractured and weathered rock. Rotterdam: A A Balkema.
Chicago
Akai K Ed, International symposium on weak rock (1981 : Tokyo), Hayashi M Ed and Nishimatsu Y Ed. 1981. Proceeding on weak rock: soft, fractured and weathered rock. Rotterdam: A A Balkema.
Harvard
Akai K Ed, International symposium on weak rock (1981 : Tokyo), Hayashi M Ed and Nishimatsu Y Ed. (1981). Proceeding on weak rock: soft, fractured and weathered rock. Rotterdam: A A Balkema.
MLA
Akai K Ed, International symposium on weak rock (1981 : Tokyo), Hayashi M Ed and Nishimatsu Y Ed. Proceeding on weak rock: soft, fractured and weathered rock. Rotterdam: A A Balkema. 1981.
