(1996). BS4978: 1996 specification for visual strength grading of softwood (3rd ed.). London: British Standards Institution.
Chicago Style CitationBS4978: 1996 Specification for Visual Strength Grading of Softwood. 3rd ed. London: British Standards Institution, 1996.
MLA CitationBS4978: 1996 Specification for Visual Strength Grading of Softwood. 3rd ed. London: British Standards Institution, 1996.
Warning: These citations may not always be 100% accurate.