-. (1977). Weatherproofing. Time-Life books.
Dyfyniad Arddull Chicago-. Weatherproofing. Virginia: Time-Life books, 1977.
Dyfyniad MLA-. Weatherproofing. Time-Life books, 1977.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.
-. (1977). Weatherproofing. Time-Life books.
Dyfyniad Arddull Chicago-. Weatherproofing. Virginia: Time-Life books, 1977.
Dyfyniad MLA-. Weatherproofing. Time-Life books, 1977.