APA
Engineering-Geological Society of Finland. Papers. Vol 9, . (1973). Roch mechanics meeting 1973. Helsingfors: Engineering-Geological Society of Finland. Papers. Vol 9.
Chicago
Engineering-Geological Society of Finland. Papers. Vol 9, . 1973. Roch mechanics meeting 1973. Helsingfors: Engineering-Geological Society of Finland. Papers. Vol 9.
Harvard
Engineering-Geological Society of Finland. Papers. Vol 9, . (1973). Roch mechanics meeting 1973. Helsingfors: Engineering-Geological Society of Finland. Papers. Vol 9.
MLA
Engineering-Geological Society of Finland. Papers. Vol 9, . Roch mechanics meeting 1973. Helsingfors: Engineering-Geological Society of Finland. Papers. Vol 9. 1973.