Dyfyniad APA

Steele, J. D. (1869). Fourteen weeks in descriptive astronomy. A.S. Barnes & Co..

Dyfyniad Arddull Chicago

Steele, Joel Dorman. Fourteen Weeks in Descriptive Astronomy. New York: A.S. Barnes & Co., 1869.

Dyfyniad MLA

Steele, Joel Dorman. Fourteen Weeks in Descriptive Astronomy. A.S. Barnes & Co., 1869.

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