Gaya APA

ASTM, . (2005). ASTM D 5977 - 03 (Reapproved 2007) Standard specification for high load rotational spherical bearings for bridges and structure . : ASTM.

Gaya MLA

ASTM, . "ASTM D 5977 - 03 (Reapproved 2007) Standard specification for high load rotational spherical bearings for bridges and structure". : ASTM, 2005. Diorama.