@book{Spéder2001,
author = {Spéder, Z.},
title= {Turning Points of the Life Course: Research Plan and Questionnaire of the Hungarian Social and Demographic Panel Survey (HSDPS)},
year = {2001},
URL = {http://www.dpa.demografia.hu},
address = {Budapest},
publisher = {Demographic Research Institute at the Central Statistical Office},
}