Dyfyniad APA

Lehmann, H. M., & Kennard, B. E. (1922). Glass and glassware. Ronald press company.

Dyfyniad Arddull Chicago

Lehmann, Helen Mary, and Beulah Elfreth Kennard. Glass and Glassware. New York: Ronald press company, 1922.

Dyfyniad MLA

Lehmann, Helen Mary, and Beulah Elfreth Kennard. Glass and Glassware. Ronald press company, 1922.

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