Dyfyniad APA

Hopkins , W. C., & Williams, D. L. (1968). Converting factors for Southern pine products. State University.

Dyfyniad Arddull Chicago

Hopkins , William C., and David L. Williams. Converting Factors for Southern Pine Products. Louisiana: State University, 1968.

Dyfyniad MLA

Hopkins , William C., and David L. Williams. Converting Factors for Southern Pine Products. State University, 1968.

Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.