Gaya APA

Hardy, H, R, A, L, F, W. (1977). Proc. First Conference on Acoustic Emision/Microseisme Activity in Geologic Structures and Materials. . Germany: Trans Tech Publications.

Gaya MLA

Hardy, H., Reginald, And, Leighton, Frederick, W.. "Proc. First Conference on Acoustic Emision/Microseisme Activity in Geologic Structures and Materials.". Germany: Trans Tech Publications, 1977. Text.