Van Gaasbeek, R. M. (1941). A practical course in roof framing: The underlying principles and their application to practical work, especially written for foremen, journeymen and apprentice woodworkers, and as a text book for schools (4th ed., rev. and enl.). F.J. Drake & Company.
Chicago Style (17th ed.) CitationVan Gaasbeek, Richard Montgomery. A Practical Course in Roof Framing: The Underlying Principles and Their Application to Practical Work, Especially Written for Foremen, Journeymen and Apprentice Woodworkers, and as a Text Book for Schools. 4th ed., rev. and enl. Chicago: F.J. Drake & Company, 1941.
MLA (9th ed.) CitationVan Gaasbeek, Richard Montgomery. A Practical Course in Roof Framing: The Underlying Principles and Their Application to Practical Work, Especially Written for Foremen, Journeymen and Apprentice Woodworkers, and as a Text Book for Schools. 4th ed., rev. and enl. F.J. Drake & Company, 1941.