Dyfyniad APA

Lee, H. I., & Barr, W. N. (1965). Practical secretarial work/4e (4th ed.). Sir Isaac pitman & sons limitd.

Dyfyniad Arddull Chicago

Lee, Henry I., and William N. Barr. Practical Secretarial Work/4e. 4th ed. London: Sir Isaac pitman & sons limitd, 1965.

Dyfyniad MLA

Lee, Henry I., and William N. Barr. Practical Secretarial Work/4e. 4th ed. Sir Isaac pitman & sons limitd, 1965.

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