Dyfyniad APA

Johnston, J. (1850). Elements of chemistry for the use of schools. Thomas, Cowperthwait, & Co.

Dyfyniad Arddull Chicago

Johnston, John. Elements of Chemistry for the Use of Schools. Philadelphia: Thomas, Cowperthwait, & Co, 1850.

Dyfyniad MLA

Johnston, John. Elements of Chemistry for the Use of Schools. Thomas, Cowperthwait, & Co, 1850.

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