Dyfyniad APA

Daly, R. (1972). Earth's most challenging mysteries. Baker Book House.

Dyfyniad Arddull Chicago

Daly, Reginald. Earth's Most Challenging Mysteries. Baker Book House, 1972.

Dyfyniad MLA

Daly, Reginald. Earth's Most Challenging Mysteries. Baker Book House, 1972.

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