Dyfyniad APA

Day, A. J., & Hoffman, V. (2000). The annual register: A record of world events 1999. Keesing's Worldwide.

Dyfyniad Arddull Chicago

Day, Alan J., and Verena Hoffman. The Annual Register: A Record of World Events 1999. London, [England]: Keesing's Worldwide, 2000.

Dyfyniad MLA

Day, Alan J., and Verena Hoffman. The Annual Register: A Record of World Events 1999. Keesing's Worldwide, 2000.

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