Dyfyniad APA

Johnson, E. R., & Van Metre, T. W. (1916). Principles of railroad transportation. D. Appleton.

Dyfyniad Arddull Chicago

Johnson, Emory R., and T. W. Van Metre. Principles of Railroad Transportation. New York: D. Appleton, 1916.

Dyfyniad MLA

Johnson, Emory R., and T. W. Van Metre. Principles of Railroad Transportation. D. Appleton, 1916.

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