(19). Life skills: A course in applied problem solving. Training Research and Development Station [u.a.].
Chicago-Zitierstil (17. Ausg.)Life Skills: A Course in Applied Problem Solving. Prince Albert, Saskatchewan, Ca: Training Research and Development Station [u.a.], 19.
MLA-Zitierstil (9. Ausg.)Life Skills: A Course in Applied Problem Solving. Training Research and Development Station [u.a.], 19.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.