Craig, H. T. (1969). Thresholds to adult living (2nd ed.). Bennett.
Dyfyniad Arddull ChicagoCraig, Hazel Thompson. Thresholds to Adult Living. 2nd ed. Peoria, Ill: Bennett, 1969.
Dyfyniad MLACraig, Hazel Thompson. Thresholds to Adult Living. 2nd ed. Bennett, 1969.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.