Dyfyniad APA

THE ASTRONOMICAL .... (1999). The Astronomical almanak for the year 2000: Data forastronomy, apace sciences, geodesy, suveying, ... U.S. Goverment Printing Offece.

Dyfyniad Arddull Chicago

THE ASTRONOMICAL .... The Astronomical Almanak for the Year 2000: Data Forastronomy, Apace Sciences, Geodesy, Suveying, ... Washington: U.S. Goverment Printing Offece, 1999.

Dyfyniad MLA

THE ASTRONOMICAL .... The Astronomical Almanak for the Year 2000: Data Forastronomy, Apace Sciences, Geodesy, Suveying, ... U.S. Goverment Printing Offece, 1999.

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