Gaya APA
Roberts, C, L., Wollmann, G, P.
(2000).
PTI Anchorage Zone Design
.
Phoenix:
Post tensioning institute.
Gaya MLA
Roberts, Carin, L., Wollmann, Gregor, P.
"PTI Anchorage Zone Design".
Phoenix:
Post tensioning institute,
2000.
Text.