Gaya APA

ASTM, . (1997). ASTM D 4879 (reapproved 1996) ; ASTM D 4879 - 02 Standard guide for geotechnical mapping of large underground openings in rock . : ASTM.

Gaya MLA

ASTM, . "ASTM D 4879 (reapproved 1996) ; ASTM D 4879 - 02 Standard guide for geotechnical mapping of large underground openings in rock". : ASTM, 1997. Diorama.