1.
Fragebogen zur frühkindlichen Sprachentwicklung (FRAKIS) und FRAKIS-K (Kurzform) ; [Manual]
by Szagun, Gisela
Publisher: Frankfurt am Main, Pearson Assessment & Information; Libraries: UHH
2009

2.
German communicative development inventory : an adaptation of the MacArthur-Bates communicative development inventory for toddlers
by Szagun, Gisela
Publisher: Frankfurt am Main, Lang; Libraries: UHH
2014
