Markle, S. (1995). Pioneering ocean depths. Atheneum Books for Readers.
Dyfyniad Arddull ChicagoMarkle, Sandra. Pioneering Ocean Depths. New York: Atheneum Books for Readers, 1995.
Dyfyniad MLAMarkle, Sandra. Pioneering Ocean Depths. Atheneum Books for Readers, 1995.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.