375123 Parmley, R. O. (1981). Field engineer's manual. New York : McGraw-Hill.
Lua i Stíl Chicago (17ú heag.)375123 Parmley, Robert O. Field Engineer's Manual. New York : McGraw-Hill, 1981.
Lua MLA (9ú heag.)375123 Parmley, Robert O. Field Engineer's Manual. New York : McGraw-Hill, 1981.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.