Cita APA (7th ed.)

(1921). Handbook of National steel lumber, produced by the National pressed steel co., prepared by the Steel lumber division, under the direction of H. M. Naugle, Stanley Macomber.

Cita Chicago (17th ed.)

Handbook of National Steel Lumber, Produced by the National Pressed Steel Co., Prepared by the Steel Lumber Division, Under the Direction of H. M. Naugle, Stanley Macomber. 1921.

Cita MLA (9th ed.)

Handbook of National Steel Lumber, Produced by the National Pressed Steel Co., Prepared by the Steel Lumber Division, Under the Direction of H. M. Naugle, Stanley Macomber. 1921.