Dyfyniad APA
Robertson, W. A., & Ross, F. A. (1907). Actuarial theory. Oliver and Boyd.
Dyfyniad Arddull Chicago
Robertson, William Alexander, and Federick A. Ross. Actuarial Theory. Edinburgh: Oliver and Boyd, 1907.
Dyfyniad MLA
Robertson, William Alexander, and Federick A. Ross. Actuarial Theory. Oliver and Boyd, 1907.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.