Cita APA (7a ed.)

(1971). Span tables for wood joists, rafters and beams. National Research Council.

Cita Chicago Style (17a ed.)

Span Tables for Wood Joists, Rafters and Beams. Ottawa: National Research Council, 1971.

Cita MLA (9a ed.)

Span Tables for Wood Joists, Rafters and Beams. National Research Council, 1971.