Dyfyniad APA

Various. Scientific American Supplement, No. 561, October 2, 1886.

Dyfyniad Arddull Chicago

Various. Scientific American Supplement, No. 561, October 2, 1886.

Dyfyniad MLA

Various. Scientific American Supplement, No. 561, October 2, 1886.

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