Dyfyniad APA

Declittle, E. (1972). The secular variations of the elements orbit. American Philosophical Society.

Dyfyniad Arddull Chicago

Declittle, Eric. The Secular Variations of the Elements Orbit. Philadelphia: American Philosophical Society, 1972.

Dyfyniad MLA

Declittle, Eric. The Secular Variations of the Elements Orbit. American Philosophical Society, 1972.

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