Dyfyniad APA

Gibbs Philip. (1930). Since then. London: William Heinemann.

Dyfyniad Arddull Chicago

Gibbs Philip. Since Then. London: William Heinemann, 1930.

Dyfyniad MLA

Gibbs Philip. Since Then. London: William Heinemann, 1930.

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